William De Mar 5th Earl

• Preferred Name: William De Mar 5th Earl^{[1] [2] [3] [4] [5] [6]}
  
• Gender: M
  
• Burial: JUL 1281 in Milltown of Kildrummy, Aberdeenshire, Scotland at LATI: N7.2384 LONG: E2.8802
  
• Death: 25 JUL 1281 in Kildrummy Castle, Kildrummy, Aberdeen, Scotland, United Kingdom
  
• Occupation: Lord Chamberlain of ScotlandBET 1252 AND 1260 in Scotland
  
• FSID: LB1P-CQ7
  
• Birth: 1222 in Aberdeen, Aberdeen City, Aberdeen, Scotland, United Kingdom at LATI: N7.1483 LONG: E2.0937
  
• Kildrummy+Castle: with note: Description: Uilleam was responsible for the construction of Kildrummy Castle, the greatest castle to have been built in 13th century northern Scotland
  
• Notes:

  === Life Sketch ===
  https://en.wikipedia.org/wiki/Uilleam,_Earl_of_Mar
  William of Mar, or Uilleam mac Dhonnchaidh (Anglicized: William, Duncan's son), was perhaps the greatest of the mormaers of Mar ruling from 1244 to 1276, also known as Earl of Mar.
  Uilleam was responsible for the construction of Kildrummy Castle, the greatest castle to have been built in 13th century northern Scotland. It is one of the few examples where a native Scottish magnate built a large-scale fortification, something normally practiced by the incoming French.
  Uilleam, more than any of his predecessors, participated in Scottish and even British-wide politics, becoming a leading figure in the royal regime of Alexander II, and the minority of Alexander III. By 1244, Uilleam had married into the Comyn house, the fastest rising French family in the Scottish kingdom. He married Elisabeth Comyn, the daughter of William Comyn, jure uxoris Earl of Buchan and Marjory, Countess of Buchan. The Comyn-Mar alliance helped fight off the ambitions of the Durwards, who were then in prime favor with the king.
  Alan Durward used his descent from a daughter of Gille Críst to contest Uilleam's right to the Mormaerdom, but Uilleam successfully held off these claims. Uilleam and the Comyn Earl of Menteith then launched accusations of treason towards Alan while at the court of Henry III of England at York.
  Uilleam engaged in supplementing his power on a nationwide basis. He held the post of Sheriff of Dumbarton between 1264 and 1266, a post which opened up connections in the western Highlands. Uilleam was able to marry his younger son Donnchadh to Cairistíona Nic Ruaidhrí, daughter of the Hebridean chief Ailéan mac Ruaidhrí, a man who had been one of the principal supporters of Norwegian cause against the Scottish Crown in the 1260s.
  When his wife Isabel (also called Elizabeth) died in 1267, Uilleam married Muriel, the daughter of Maol Íosa II, Mormaer of Strathearn.
  
  Uilleam died in 1276, and was succeeded by his son Domhnall.
  ************************
  The Peerage
  William, 5th Earl of Mar1
  
  M, #4591, d. from 16 May 1291 to 12 November 1291
  Last Edited=28 Dec 2011
  
  William, 5th Earl of Mar was the son of Duncan, 4th Earl of Mar.1 He married, firstly, Elizabeth Comyn, daughter of William Comyn, Earl of Buchan and Margaret, Countess of Buchan.2
  
  He married, secondly, Muriel of Strathearn, daughter of Malise, 5th Earl of Strathearn.2 He died from 16 May 1291 to 12 November 1291.3 He was also reported to have died in 1281.1
  
  He succeeded as the 5th Earl of Mar [S., c. 1115] before 7 February 1243/44.1 He was Chamberlain to King Alexander III of the Scots circa 1252.1 He was member of the Council of Regency of Scotland circa 1255.1 He held the office of Chamberlain of Scotland between 1262 and 1264.1 He held the office of Sheriff of Dunbartonshire between 1264 and 1266.1
  
  Child of William, 5th Earl of Mar and Elizabeth Comyn
  
  Donald, 6th Earl of Mar+1 d. a 25 Jul 1297
  
  BIO
  BIO: from http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#DonaldMardied1297A as of 12/9/2018
  
  WILLIAM (-before 25 Jul 1281, maybe before Jan 1279). "…Willelmo filio Duncani comitis de Mar…"
  
  === Member of Council of Regency of Scotland ===
  Member of Council of Regency of Scotland
  
  === wikepedia ===
  Uilleam, Earl of Mar
  From Wikipedia, the free encyclopedia
  Uilleam of Mar, or Uilleam mac Dhonnchaidh (Anglicized: William, Duncan's son), was perhaps the greatest of the mormaers of Mar ruling from 1244 to 1276, also known as Earl of Mar.
  
  Uilleam was responsible for the construction of Kildrummy Castle, the greatest castle to have been built in 13th century northern Scotland. It is one of the few examples where a native Scottish magnate built a large-scale fortification, something normally practiced by the incoming French.
  
  Uilleam, more than any of his predecessors, participated in Scottish and even British-wide politics, becoming a leading figure in the royal regime of Alexander II, and the minority of Alexander III. By 1244, Uilleam had married into the Comyn house, the fastest rising French family in the Scottish kingdom. He married Elisabeth Comyn, the daughter of William Comyn, jure uxoris Earl of Buchan. The Comyn-Mar alliance helped fight off the ambitions of the Durwards, who were then in prime favor with the king.
  
  Alan Durward used his descent from a daughter of Gille Críst to contest Uilleam's right to the Mormaerdom, but Uilleam successfully held off these claims. Uilleam and the Comyn Earl of Menteith then launched accusations of treason towards Alan while at the court of Henry III of England at York.
  
  Uilleam engaged in supplementing his power on a nationwide basis. He held the post of Sheriff of Dumbarton between 1264 and 1266, a post which opened up connections in the western Highlands. Uilleam was able to marry his younger son Donnchadh to Cairistíona Nic Ruaidhrí, daughter of the Hebridean chief Ailéan mac Ruaidhrí, a man who had been one of the principal supporters of Norwegian cause against the Scottish Crown in the 1260s.
  
  When his wife Isabel (also called Elizabeth, daughter of Sir William Comyn and Marjory Colham) died in 1267, Uilleam married Muriel, the daughter of Maol Íosa II, Mormaer of Strathearn.
  
  Uilleam died in 1276, and was succeeded by his son Domhnall.
  
  === family group sheet ===
  William, Earl of Mar, who succeeded his father [Duncan, Earl of Mar] in the earldom sometime before 7 February 1243-44, when he witnesses a royal charter as Earl of Mar. The first notice of him on record is in the agreement of 1242, between his father and the monks of St. Andrews, where he appears as a witness. He was one of the sureties of the treaty of Newcastle in September 1244.
  
  After the death of King Alexander II he took a prominent part in the policy of the new reign. He became Great Chamberlain of Scotland in 1252 and continued such till September 1255, when he and his colleagues were displaced by others proposed by King Henry III, the young king’s father-in-law, of whom Alan Doorward (the son of Thomas ) was one.
  
  It was about this time that Alan Doorward made another attempt to obtain the earldom of Mar. ... on 4 october 1257, {Pope Alexander IV] issued … letter, apparently genuine this time, detailing the whole case, the statement made by Durward impunging Earl william’s right, his craving the letters to the Bishop of Brechin who referred the question to the apostolic See, before which court Earl william’s procurator produced the Papal letters delaring the falsity of the first letters if they agreed with the transcript. The Papal commissioner having heard all the arguments on both sides … The Pope confirmed his commissioner’s judgment, and directed the Bishop of Aberdeen to examine witnesses as to the the birth of Earl Morgund, after which no more is on record regarding the case.
  
  Whatever further proceedings were taken, Earl William remained in possession, which supports the suggestion that the alleged illegitimacy was perhaps only a product of ‘the difference between the Celtic usage and the Canon law which was superseding it, but apparently to prevent any prejudice to others, the Earl, on 23 January 1267-68, while confirming to the canons of St. Andrews certain grants by his grandather, Morgund, and grandmother, Agnes, added a clause that if any grant had been unlawfully made or confirmed by these persons, he and his heirs would supply what can be supplied so far as possible.
  
  The Earl of Mar was restored to a place in the government in 1257, and took a prominent part in public affairs. He again, about 1262, became Grand Chamberlain, and held office till 1267.
  
  In that or the following year, a great dispute arose between him and the bishop of Moray because of many injuries done to the church of Moray by the Earl, and the latter was excommunicated by the Papal legate ...
  
  In 1264 he was one of two commanders sent to compel the Islesmen to submit to King Alexander’s rule, and in 1270 he was one of an embassy to England to negotiate for the earldom of Huntingdon.
  
  He died before 25 July 1281,
  
  when his son Donald was Earl, but probably not long before, as he seems to have contributed to the army in Wales.
  
  This Earl of Mar married, first, a daughter of William Comyn, Earl of Buchan. Her name is said to be Elizabeth, and she died in 1267.
  
  By his first wife the Earl had
  
  Donald, who became Earl of Mar.
  
  He married, secondly, Muriel daughter of Malise, Earl of Strathearn, granddaughter and coheiress of Robert de Muscamp, who survived him, and died, between 16 May and 12 November 1291, without issue, as her sister, Mary, wife of Nicholas Graham, was her heir.
  
  Source: THE SCOTS PEERAGE, ed. by Sir James Balfour Paul, Vol V, Edinburgh, 1906, pp. 574-7
  ------------------------------
  Notes for Elizabeth (Spouse 1)
  By his [William’s] marriage with the Countess of Buchan
  
  he had issue:
  
  1. Alexander, who succeeded his mother in the earldom.
  2. Sir William.
  3. Fergus, mentioned in the foundation charter of the Hospital of Turriff …
  4. Idonea, married (before her father’s death) to Sir Gilbert Hay …
  
  5. Elizabeth, married to William, Earl of Mar. She died in 1267.
  
  6. Agnes, who is said to have been married to Philip Meldrum of that Ilk. She and her husband had a dispute with the monks of Arbroath in 1263.
  
  Source: THE SCOTS PEERAGE, ed. by Sir James Balfour Paul, Vol II, Edinburgh, 1906, p. 252-4.
  ------------------------------
  
  This Earl of Mar married, first, a daughter of William Comyn, Earl of Buchan. Her name is said to be Elizabeth, and she died in 1267.
  
  By his first wife the Earl had
  
  Donald, who became Earl of Mar.
  
  Source: THE SCOTS PEERAGE, ed. by Sir James Balfour Paul, Vol V, Edinburgh, 1906, pp. 574-7
  ------------------------------
  Notes for Murial (Spouse 2)
  This Earl [Malise] married, first, Marjory, daughter and one of the coheireses of Sir Robert de Muschamp. The marriage must have taken place about 1243 or 1244, as on 20 March 1254-55 it was testified the Muriel, their eldest daughter had reached the age of ten.
  
  The countess died befor the last date:
  
  Issue:
  
  Murial, elder daughter and coheiress of Marjory Muschamp, the Earl’s first wife, born in 1244 ...
  
  Maria, born about 1248, as she was six years old in March 1254-55, co-heiress with her sister, Muriel ...
  
  Source: THE SCOTS PEERAGE, ed. by Sir James Balfour Paul, Vol VIII, Edinburgh, 1906, pp. 245-7
  ------------------------------
  
  Murial, elder daughter and coheiress of Marjory Muschamp, the Earl’s first wife, born in 1244;
  
  married (after 1267), as his second wife, to William, Earl of Mar, who died in 1281.
  
  She survived him, dying between May and November 1291, without issue.
  
  Source: THE SCOTS PEERAGE, ed. by Sir James Balfour Paul, Vol VIII, Edinburgh, 1906, p. 247
  ------------------------------
  
  He [William of Mar] married, secondly, Muriel daughter of Malise, Earl of Strathearn, granddaughter and coheiress of Robert de Muscamp,
  who survived him, and
  
  died, between 16 May and 12 November 1291, without issue,
  
  as her sister, Mary, wife of Nicholas Graham, was her heir.
  
  Source: THE SCOTS PEERAGE, ed. by Sir James Balfour Paul, Vol V, Edinburgh, 1906, pp. 574-7
  -----------------------------
  
  === AFN Additional information received fro ===
  AFN Additional information received from tghe book "Robert the Bruce's Rivals: The Comyns 1212-1314".
  
  === My 21st ===
  Great Grandfather
  
  === WILLIAM, EARL OF MAR [SCT], son and heir ===
  WILLIAM, EARL OF MAR [SCT], son and heir. He may have been the William de Mar who attested charters of Alexander II, 16 May 1234 and 28 April 1240. As William Earl of Mar, he witnessed a royal charter of 7 February 1243, and in September of that year was one of the guarantors of Alexander's confimation of the pact of 1237. He became Chamberlain to Alexander III about 1252. In or before 1254 Alan Durward unsuccessfully revived his father's claim to the Earldom of Mar. In September 1255 the Earl was to visit Henry III, then in the North upon the affairs of Scotland; but the existing regency, to which Mar belonged, was displaced at the instance of the English King, and others (among whom was Alan Durward) were appointed till the Scottish King should come of age. In December following the Earl was again to visit Henry III in Englad. In 1258 his party returned to power (Durward then acting with them], and the Earl was again Chamberlain from about 1262 to 1264, and Sheriff of Dunbarton 1264-1266. He married, 1stly, Elizabeth, daughyter of William (Comyn]. EARL OF BUCHAN [SCT], by Margaret, suo jure COUNTESS of BUCHAN [SCT]. She died 1267. He married, 2ndly, Muriel, 1st daughter of Malise, EARL OF STRATHERN [SCT], by Marjory, daughter and coheir of Robert DE MUSCHAMP. He died (probably in the summer of) 1281. His widow, who. was aged 10 in 1254/5, and who, only a few months before her death, did homage to Edward I, died s.p., between 16 May and 12 November 1291. [Complete Peerage VIII:401-2]
  
  ________________________________
  
  William Mar, ninth Earl of (d 1281?), was the son of Duncan, eight earl of Mar, and grandson of Morgrund, fifth earl. He succeeded his father in or before 1237, when he attested at York the agreement between Henry III of England and Alexander II of Scotland. His right of succession was contested by Alan Durward, who asserted that William's father and grandfather were both of illegitimate birth, and that he ought to succeed as lawful heir. But apparently the case was arranged on the footing of an agreement which had been made about 1228 with Thomas Durward, father of Alan, who received a large accession of territory in Mar; and the earldom remained with William de Mar. In 1249, during the minority of Alexander III, he was appointed one of the regents of Scotland. He held the office of great chamberlain of Scotland from 1252 to 1255, in which year, owing to political dissensions, he was removed from the government, and received permission from Henry to sojourn for a time in England. In 1258 he was a party to the treaty between some of the Scots and Llewellyn, prince of Wales, not to make peace with Henry without each other's consent. But in the same year he was reappointed one of the Scottish regents, and they received the promise of Henry's support so long as they acted righteously. He again became great chamberlain of Scotland in 1262, and continued in the office till 1267. He was also sheriff of Dumbartonshire. After the battle of Largs in 1263 he was sent by Alexander III with a military force to reduce the cheifs of the Western Isles who had supported Haco, king of Norway. He was still alive in 1273, but must have died in or before 1281. He married Elizabeth, daughter of William Comyn, earl of Buchan, by whom he had two sons, Donald, tenth earl, who succeeded, and Duncan; and after her death, he married an English lady, Muriel, granddaughter and one of the heiresses of Robert de Muschaump, whose barony lay in the see of Durham, but had no issue by her. She died in 1291. [Dictionary of National Biography XII:1003]
  
  _____________________________________
  
  William, Earl of Mar, who succeeded his father in the earldom sometime before 7 February 1243-44, when he witnesses a royal charter as Earl of Mar. The first notice of him on record is in the agreement of 1242, between his father and the monks of St Andrews, where he appears as a witness. He was one of the sureties of the treaty of Newcastle in September 1244. After the death of King Alexander II he took a prominent part in the policy of the new reign. He became Great Chamberlain of Scotland in 1252 and continued such till September 1255, when he and his colleagues were displaced by others proposed by King Henry III, the young king's father-in-law, of whom Alan Doorward (the son of Thomas) was one.
  
  It was about this time that Alan Doorward made another attempt to obtain the earldom of Mar. His first attack, previous to December 1254, was somewhat unsuccessful. The spurious document of 1171 was most probably brought forward at this time on behalf of the Earl of Mar. It is believed by Mr Skene to have been the work of Mr Richard Veyremut, otherwise Veremundus, a canon of St Andrews, from whose now lost writings Boece borrowed the greater part of his fabulous history. He appears to have been a partisan of the Earl of Mar, to two of whose charters he is a witness. But it has escaped attention that Alan Durward also called forgery to his aid, being apparently first to use it. His claim was that William of Mar detained the earldom of Mar, which Alan declared belonged to himself, as Morgund and Duncan, whom William succeeded, were not born in lawful marriage. This statement is contained in Papal letters which he is said to have craved and exhibited, directed to the Bishop of Brechin and Dean of Dunkeld, commanding them to examine into the matter. The letters are dated 13 December 1254, in the first year of Pope Alexander IV, but at a later date, on 28 March 1257, that Pontiff, at the request of Earl William, declared that a transcript of the letters he had seen was false, and ordered the production of the original before the Abbot of Jedburgh and others commissioned to punish the forger. Some months later, on 4 October 1257, the same Pope issued similar letters, apparently genuine this time, detailing the whole case, the statement made by Durward impugning Earl William's right, his craving the letters to the Bishop of Brechin who referred the question to the Apostolic See, before which court Earl William's procurator produced the Papal letters declaring the falsity of the first letters if they agreed with the transcript. The Papal Commissioner having heard all the arguments on both sides, on Durward's procurator declaring that he had not the true original letters with him, though he made oath that they were in Scotland, quashed the whole proceedings, while granting leave to the parties to crave Papal letters for their right in the matter. The Pope confirmed his commissioner's judgment, and directed the Bishop of Aberdeen to examine witnesses as to the birth of Earl Morgund, after which no more is on record reguarding the case. Whatever further proceedings were taken, Earl William remained in possession, which supports the suggestion that the alleged illegitimacy was perhaps only a product of 'the difference between the Celtic usage and the Canon low which was superseding it.' But, apparently to prevent any prejudice to others, the Earl, on 23 January 1267-68, while confirming to the canons of St Andrews certain grants by his grantfather Morgund and his grandmother Agnes, added a clause that if any grant had been unlawfully made or confirmed by these persons, he and his heirs would supply what can be supplies so far as possible.
  
  The Earl of Mar was restored to a place in the government in 1257, and took a prominent part in public affairs. He again, about 1262, became Grand Chamberlain, and held office till 1267. In that or the following year a great dispute arose between him and the Bishop of Moray because of many injuries done to the church of Moray by the Earl, and the latter was excommunicated by the Papal legate. It was perhaps on account of this quarrel with the Church that Bower calls him 'in malis actibus ingeniosus satis.' In 1262 he was one of two commanders sent to compel the Islesmen to submit to King Alexander's rule, and in 1270 he was one of an embassy to England to negotiate for the earldom of Huntingdon. He died before 25 July 1281, when his son Donald was Earl, but probably not long before, as he seems to have contributed to the army in Wales.
  
  This Earl of Mar married, first, a daughter of William Comyn, Earl of Buchan. Her name is said to be Elizabeth, and she died in 1267. He married, secondly, Muriel, daugther of Malise, Earl of Strathearn, granddaughter and coheiress of Robert de Muscamp, who survived him, and died, between 16 May and 12 November 1291, without issue, as her sister Mary, wife of Nicholas Graham, was her heir. [Scots Peeerage V:574-577]
  
  === Weis. 252-30. ===
  Weis. 252-30.
  
  === !#21-v8 FN #B2L0K8; ===
  !#21-v8 FN #B2L0K8;
  
  === Uilleaum mac Dhonnchaidh ===
  Anglicized: William, Duncan's son

• m. ABT 1242 in Kildrummy, Aberdeenshire, Scotland
• m. 1242 in Kildrummy, Cionn Droma, Aberdeen, Scotland, United Kingdom

1. Margaret MacGilronan, b. 1248 in Kildrummy Castle, Kildrummy, Aberdeen, Scotland, United Kingdom     d. 1337 in Erskine, Renfrew district, Renfrew, Scotland, United Kingdom
2. Domhnall de Mar - 6th Earl of Mar I, b. MAR 1243 in Kildrummy Castle, Aberdeenshire, Scotland     d. 25 JUL 1297 in Castle Kildrummy, Kildrummy, Aberdeenshire, Scotland

• m. 1237 in Aberdeen, Aberdeen City, Aberdeen, Scotland, United Kingdom

1. Title: Cracroft's Peerage: The Complete Guide to the British Peerage & Baronetage
   Author: Cracroft-Brennan, Patrick, ed, The Peerage: Mar, Earl of (S, 1114)
   Publication: Name: http://www.cracroftspeerage.co.uk/mar1114.htm;
   Note: Cracrofts Peerage Limited, c/o Bambury & Co Chartered Accountants, Bicester Innovation Centre, Telford Road, Bicester, Oxfordshire OX26 4LD. Tel: 01869 222830; E-mail: info@cracroftspeerage.co.uk), The Peerage: Mar, Earl of (S, 1114): http://www.cracroftspeerage.co.uk/mar1114.htm.
   
2. Title: The Peerage
   Author: Citations: [S37] BP2003 volume 2, page 2603. See link for full details for this source. Hereinafter cited as. [S37] [S323] Sir James Balfour Paul, The Scots Peerage: founded on Wood's edition of Sir Robert Douglas's The Peerage of Scotland (Edinburgh, Scotland: David Douglas, 1904), volume V, page 576. Hereinafter cited as The Scots Peerage. [S323] Sir James Balfour Paul, The Scots Peerage, volume V, page 577.
   Publication: Name: http://thepeerage.com/p460.htm#i4591;
   Note: William, 5th Earl of Mar1: ID #4591 M, #4591, d. from 16 May 1291 to 12 November 1291 Last Edited=28 Dec 2011 William, 5th Earl of Mar was the son of Duncan, 4th Earl of Mar.1 He married, firstly, Elizabeth Comyn, daughter of William Comyn, Earl of Buchan and Margaret, Countess of Buchan.2 He married, secondly, Muriel of Strathearn, daughter of Malise, 5th Earl of Strathearn.2 He died from 16 May 1291 to 12 November 1291.3 He was also reported to have died in 1281.1 He succeeded as the 5th Earl of Mar [S., c. 1115] before 7 February 1243/44.1 He was Chamberlain to King Alexander III of the Scots circa 1252.1 He was member of the Council of Regency of Scotland circa 1255.1 He held the office of Chamberlain of Scotalnd between 1262 and 1264.1 He held the office of Sheriff of Dunbartonshire between 1264 and 1266.1 Child of William, 5th Earl of Mar and Elizabeth Comyn Donald, 6th Earl of Mar+1 d. a 25 Jul 1297
   
3. Title: The Scots Peerage: founded on Wood's edition of Sir Robert Douglas's The Peerage of Scotland
   Author: Paul, Sir James Balfour, ed. (Edinburgh, Scotland: David Douglas, 1904). Vol. 5; The Ancient Earls of Mar; p. 575
   Note: Available at Internet Archive: https://archive.org/details/scotspeeragefoun05pauluoft, Vol. 5; The Ancient Earls of Mar; p. 575: https://archive.org/stream/scotspeeragefoun05paul#page/572/mode/1up.
   
4. Title: Wikipedia: Uilleam of Mar
   Author: Oram, Richard D., "The Earls and Earldom of Mar, c1150-1300," Steve Boardman and Alasdair Ross (eds.) The Exercise of Power in Medieval Scotland, c.1200-1500, (Dublin/Portland, 2003).
   Publication: Name: https://en.wikipedia.org/wiki/Uilleam,_Earl_of_Mar;
   Note: William of Mar, or Uilleam mac Dhonnchaidh (Anglicized: William, Duncan's son), was perhaps the greatest of the mormaers of Mar ruling from 1244 to 1276, also known as Earl of Mar. Uilleam was responsible for the construction of Kildrummy Castle, the greatest castle to have been built in 13th century northern Scotland. It is one of the few examples where a native Scottish magnate built a large-scale fortification, something normally practiced by the incoming French. Uilleam, more than any of his predecessors, participated in Scottish and even British-wide politics, becoming a leading figure in the royal regime of Alexander II, and the minority of Alexander III. By 1244, Uilleam had married into the Comyn house, the fastest rising French family in the Scottish kingdom. He married Elisabeth Comyn, the daughter of William Comyn, jure uxoris Earl of Buchan and Marjory, Countess of Buchan. The Comyn-Mar alliance helped fight off the ambitions of the Durwards, who were then in prime favor with the king. Alan Durward used his descent from a daughter of Gille Críst to contest Uilleam's right to the Mormaerdom, but Uilleam successfully held off these claims. Uilleam and the Comyn Earl of Menteith then launched accusations of treason towards Alan while at the court of Henry III of England at York. Uilleam engaged in supplementing his power on a nationwide basis. He held the post of Sheriff of Dumbarton between 1264 and 1266, a post which opened up connections in the western Highlands. Uilleam was able to marry his younger son Donnchadh to Cairistíona Nic Ruaidhrí, daughter of the Hebridean chief Ailéan mac Ruaidhrí, a man who had been one of the principal supporters of Norwegian cause against the Scottish Crown in the 1260s. When his wife Isabel (also called Elizabeth) died in 1267, Uilleam married Muriel, the daughter of Maol Íosa II, Mormaer of Strathearn. Uilleam died in 1276, and was succeeded by his son Domhnall.
   
5. Title: Historic Earls and Earldoms of Scotland
   Author: Mackintosh, John, 1833-1907. (W. Jolly, Aberdeen. 1898). Chapter 1; Earldom and Earls of Mar: p. 23
   Publication: Name: https://archive.org/details/historicearlsear00mack/page/23/mode/1up?view=theater;
   Note: Available at Internet Archive: https://archive.org/details/peerageofscotlan02douguoft
   
6. Title: Uilleam mac Dhonnchaidh, "Find A Grave Index"
   Author: "Find A Grave Index," database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:68J9-7KNL : 13 September 2021), Uilleam mac Dhonnchaidh, ; Burial, , ; citing record ID 228502367, Find a Grave, http://www.findagrave.com.
   Publication: Name: https://familysearch.org/ark:/61903/1:1:68J9-7KNL;