Michael Matthew Groat PhD's Genealogical Database
Individuals: 97,713 Families: 61,838
Gedcom Last Modified: December 14, 2025 00:59:10
Iorwerth ap Gwygan
- Preferred Name: Iorwerth ap Gwygan[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16]
- Alternate Name: Idnerth ap Cadwgan
- Alternate Name: Iorwerth Ap Cadwgon
- Alternate Name: Iowerth Ap Cadogan Lord Of Builth
- Alternate Name: Iorwerth Ap Cadwgon
- Alternate Name: Iorwerth Of Builth Ap Cadwgon
- Alternate Name: Iowerth ap Cadwgon
- Alternate Name: Iorwerth ap Cadwgan
- Alternate Name: Idnerth of Builth Lord
- Alternate Name: Idnerth ap Cawdgan L of Builth
- Alternate Name: Idnerth ap Cadwgan
- Alternate Name: Idnerth ap Cadogan Lord of Builth
- Alternate Name: Idnerth ap Cadagan
- Alternate Name: Iorwerth Ap Cadwgon Wales
- Alternate Name: Iorwerth CADWGON Ap
- Alternate Name: Iorwerth Cadwgon
- Alternate Name: Iorwerth ap Cadwgan
- Alternate Name: Idnerth
- Alternate Name: Idnerth Ap Cadwgon
- Alternate Name: Idnerth ap Cadogan
- Alternate Name: Idnerth ap Cadwgan Lord
- Alternate Name: Iorwerth Idnerth ap Cadwgon
- Alternate Name: Idnerth Cadwgan
- Alternate Name: Idnerth Ap Cadwgan
- Alternate Name: Iorwerth Ap Cadwgon
- Gender: M
- Seal to Parents: 15 APR 1958
- FSID: LZKQ-5D9
- Death: 1137 in Wales at LATI: N2.3302 LONG: E3.7664
- Fact: with note: Description: https://www.geni.com/people/Iorwerth-ap-Gwrgan/6000000003649663366?through=6000000007151556104
- http://familysearch.org/v1/TitleOfNobility: Lord
- Birth: ABT 1100 in Betws-yn-rhos, Denbighshire, Wales at LATI: N3.2331 LONG: E3.68
- Endowment: 15 FEB 1957
- http://familysearch.org/v1/TitleOfNobility: Lord
- http://familysearch.org/v1/TitleOfNobility: in Lord of Builth
- Notes:
=== Life Sketch ===
Iorwerth ap Gwrgan
Birth circa 1100 Betws Yn Rhos, Is Dulas, Denbighshire, Wales : Died 1137
Immediate Family:Son of Gwrgan ap Idnerth and N.N. Husband of Gwenllian verch Rhirid Father of Cynwrig ab Iorwerth Occupation:Lord of Brynffenigl
----
=== !1. Bartrum, 1400-300, Marchudd 3 and Tr ===
!1. Bartrum, 1400-300, Marchudd 3 and Tr. ap T.
=== Lord of Brynnffenigl. ===
Lord of Brynnffenigl.
=== !1. Powys Fadog, Vol. 1 pg 83; vol. 2 pg ===
!1. Powys Fadog, Vol. 1 pg 83; vol. 2 pg. 21 !1. Powys Fadog, Vol. 1 pg 83; vol. 2 pg. 21
=== Birth also shown as Rdnrsh, Wales abt 10 ===
Birth also shown as Rdnrsh, Wales abt 1023 Birth also shown as Rdnrsh, Wales abt 1023
=== !#4568-v2-p51n; v9-p670; v11-p855; v12-p ===
!#4568-v2-p51n; v9-p670; v11-p855; v12-p903; #2105-v2-p283; !ORD: TIB: ARIZO: Bap> AR, End>; FN #FPWFP3;
=== From Ancestral File (TM), data as of 2 J ===
From Ancestral File (TM), data as of 2 January 1996
=== !BIRTH: LDS Ancestral File lists date o ===
!BIRTH: LDS Ancestral File lists date of birth as "Abt 1017", while Royals Pedigree File has date of birth listed as "Abt 1020"
=== Per "Welsh Surname and Given Names, and ===
Per "Welsh Surname and Given Names, and their meanings" by AnnieLloyd
"Cadwgon" means..."battle keenness", a rule in south Wales. AlsoWogan, Cadugan Dogan.
=== !#4568-v6-p354,384,386,395,397,402; v7-p ===
!#4568-v6-p354,384,386,395,397,402; v7-p443,459; v10-p729,776; !#248-3-p635; #771-v1-p82,88,111; #1843-v29-p285; Archive Records - Royal Tribes of Wales; Eminent Welshmen; History of Powys Fadog; Heraldic Visitations of Wales; Montgomery Collections; Pedigrees of Anglesey and Caernarvon; Genealogies of Morgan and Glamorgan; Princes of South Wales; (birth 1020); Temple Records - birth 1005; FN #PZ7MMB;
=== !NOTE: The Church of Jesus Christ of Lat ===
!NOTE: The Church of Jesus Christ of Latter-day Saints, Ancestral File (TM); ; June 1998 (c), data as of 5 JAN 1998; ; , Family History Library, 35 N West Temple Street, Salt Lake City, UT 84150 USA
=== Iorwerth ap Gwrgan ===
Iorwerth ap Gwrgan
Birth circa 1100 Betws Yn Rhos, Is Dulas, Denbighshire, Wales : Died 1137
Immediate Family:Son of Gwrgan ap Idnerth and N.N. Husband of Gwenllian verch Rhirid Father of Cynwrig ab Iorwerth Occupation:Lord of Brynffenigl
----
!1. Bartrum, 1400-300, Marchudd 3 and Tr. ap T.
Line 288 from GEDCOM File not recognizable or too long: SOUR @S01@
From Ancestral File (TM), data as of 5 JAN 1998.
Lord of Brynnffenigl.
!NOTE: The Church of Jesus Christ of Latter-day Saints, Ancestral File (TM); ; June 1998 (c), data as of 5 JAN 1998; ; , Family History Library, 35 N West Temple Street, Salt Lake City, UT 84150 USA
Line 96 from GEDCOM File not recognizable or too long: NAME Iorwerth Ap /CADWGON/ GIVN Iorwerth Ap Line 97 from GEDCOM File not recognizable or too long: NAME Iorwerth Ap /CADWGON/ SURN CADWGON Line 100 from GEDCOM File not recognizable or too long: SOUR @S01@
SOURCE: LDS Ancestral File and IGI records.
!1. Bartrum, 300-1400, El. G. 1, pg. 353 and 33, pg 386
!#4568-v6-p354,384,386,395,397,402; v7-p443,459; v10-p729,776; !#248-3-p635; #771-v1-p82,88,111; #1843-v29-p285; Archive Records - Royal Tribes of Wales; Eminent Welshmen; History of Powys Fadog; Heraldic Visitations of Wales; Montgomery Collections; Pedigrees of Anglesey and Caernarvon; Genealogies of Morgan and Glamorgan; Princes of South Wales; (birth 1020); Temple Records - birth 1005; FN #PZ7MMB;
Per "Welsh Surname and Given Names, and their meanings" by AnnieLloyd
"Cadwgon" means..."battle keenness", a rule in south Wales. AlsoWogan, Cadugan Dogan.
!The Royal Tribes of Wales, Wales 1, p. 126; Eminent Welshmen, Wales 13, p 41; History of Powys Fadog, Wales 15, v. 1, p 82; Heraldic Visitations of Wales, Wales 37, v. 1, p. 313; Montgomery Collection, Montg. Pub. A, v. 1, p. 236.
!Internet Family Search Ancestral File as of 4-28-1999 AFN:HPGB-5M
!1. Powys Fadog, Vol. 1 pg 83; vol. 2 pg. 21 !1. Powys Fadog, Vol. 1 pg 83; vol. 2 pg. 21
!#4568-v2-p51n; v9-p670; v11-p855; v12-p903; #2105-v2-p283; !ORD: TIB: ARIZO: Bap> AR, End>; FN #FPWFP3;
From Ancestral File (TM), data as of 2 January 1996
=== !SOURCE: "Royal Ancestors," PC #427. ===
!SOURCE: "Royal Ancestors," PC #427.
=== SOURCE: LDS Ancestral File and IGI recor ===
SOURCE: LDS Ancestral File and IGI records.
=== !1. Bartrum, 300-1400, El. G. 1, pg. 35 ===
!1. Bartrum, 300-1400, El. G. 1, pg. 353 and 33, pg 386
=== NOT-A-MATCH: This individual is not the ===
NOT-A-MATCH: This individual is not the same as Elidir "Hen" Ap /CADWGON/ 1014-?, PAF ID {60924cb1-485b-4677-bb0c-65cbe7e433f6}
NOT-A-MATCH: This individual is not the same as Elidir "Fychan" Ap /CADWGON/ 1015-?, PAF ID {1500b709-38ce-4cdd-89d5-2e0eba2c699e}
NOT-A-MATCH: This individual is not the same as Iestyn "Farchog" Ap /CADWGON/ 1013-?, PAF ID {10699dab-b826-4e08-908b-36ceb03eb13b}
NOT-A-MATCH: This individual is not the same as Gronwy Ap /CADWGON/ 1012-?, PAF ID {cbe375d1-8f88-4964-9aa2-21c347fb1eac}
NOT-A-MATCH: This individual is not the same as Einion Ap /CADWGON/ 1010-?, PAF ID {7bb223f7-d1b4-4906-8e6e-85d2211b07f5}
NOT-A-MATCH: This individual is not the same as Gwaednerth Ap /CADWGON/ 1008-?, PAF ID {8f365254-7e23-4cfa-b04d-aaf2849c68fc}
NOT-A-MATCH: This individual is not the same as Ieuaf Ap /CADWGON/ 1004-?, PAF ID {2efb2cb5-6474-4595-99e1-c3f136ee8027}
NOT-A-MATCH: This individual is not the same as Cadfarch Ap /CADWGON/ 1006-?, PAF ID {5852e83b-4758-4423-a1fb-9f9377911ab4}
NOT-A-MATCH: This individual is not the same as Llywelyn Ap /CADWGON/ 1000-?, PAF ID {d70da289-05b6-4274-9c84-3417386b6c6b}
=== !The Royal Tribes of Wales, Wales 1, p. ===
!The Royal Tribes of Wales, Wales 1, p. 126; Eminent Welshmen, Wales 13, p 41; History of Powys Fadog, Wales 15, v. 1, p 82; Heraldic Visitations of Wales, Wales 37, v. 1, p. 313; Montgomery Collection, Montg. Pub. A, v. 1, p. 236.
=== !The Royal Tribes of Wales, Wales 1 p 12 ===
!The Royal Tribes of Wales, Wales 1 p 126; Eminent Welshmen, Wales 13, p 41; Hist of Powys Fadog, Wales 15 v 1 p 82; Heraldic Visitations of Wales, Wales 37, v 1 p 313; Montgomery Collec, Montg Pub A, v 1 p 236.
=== Non-standard gedcom data: 1 HEAL HPGB- ===
Non-standard gedcom data: 1 HEAL HPGB-5M
=== From Ancestral File (TM), data as of 5 J ===
From Ancestral File (TM), data as of 5 JAN 1998.
=== !BIRTH: @S31430@ !BAPTISM: !SEALING: @S3 ===
!BIRTH: @S31430@ !BAPTISM: !SEALING: @S31430@ !BIRTH: @S31430@ !BAPTISM: !SEALING: @S31430@
=== THE PLANTAGENET ANCESTRY (GS NUMBER Q940 ===
THE PLANTAGENET ANCESTRY (GS NUMBER Q940 D2T) P.130; SORLEY'S PEDIGREES (GS NUMBER Q929.242 SO68) P.18, 26; ANCESTRAL FILE, LDS GENEALOGICAL SOCIETY;
=== Line 288 from GEDCOM File not recognizab ===
Line 288 from GEDCOM File not recognizable or too long: SOUR @S01@
=== From Ancestral File (TM), data as of 2 J ===
From Ancestral File (TM), data as of 2 January 1996. From Ancestral File (TM), data as of 2 January 1996.
=== Line 96 from GEDCOM File not recognizabl ===
Line 96 from GEDCOM File not recognizable or too long: NAME Iorwerth Ap /CADWGON/ GIVN Iorwerth Ap Line 97 from GEDCOM File not recognizable or too long: NAME Iorwerth Ap /CADWGON/ SURN CADWGON Line 100 from GEDCOM File not recognizable or too long: SOUR @S01@
=== !#4568-v6-p354,355; v8-p542; v11-p854; ! ===
!#4568-v6-p354,355; v8-p542; v11-p854; !#248-3-p635; #771-v1-p82; #1843-v29-p285; !Arch Rec: Royal Tribes of Wales; Eminent Welshmen; History of Powys Fadog; Heraldic Visitations of Wales; (birth 1001); Temple Work - B: 7 Jun 1956, E: 15 Feb 1957; FN #HPGB5M;
=== !GENERAL:Pedigree Resource File CD 4, Pe ===
!GENERAL:Pedigree Resource File CD 4, Pedigree Resource File CD 4, (Salt Lake City, UT: Intellectual Reserve, Inc., 1999) !GENERAL:Ancestral File (TM), Ancestral File (TM), The Church of Jesus Christ of Latter-day Saints, June 1998 (c), data as of 5 JAN 1998 Repository: Family History Library 35 N West Temple Street, Salt Lake City, UT 84150 USA !GENERAL:Ancestral File (TM), Ancestral File (TM), The Church of Jesus Christ of Latter-day Saints, June 1998 (c), data as of 5 JAN 1998 Repository: Family History Library 35 N West Temple Street, Salt Lake City, UT 84150 USA
=== Marriage 1 Gwenllian Children Dyddgu fer ===
Marriage 1 Gwenllian Children Dyddgu ferch Iorwerth Sources: Title: " Welsh Genealogies AD 300-1400 & AD 1400-1500" P. C. Bartrun's, 8 vol and 18 vol Repository: Call Number: Media: Book Title: Stewart Baldwin Text: sbald@auburn.campus.mci.net (Stewart Baldwin) posted to GEN-MEDIEVAL-L-request@rootsweb.com on 26 Nov 1998 Subject: Llywelyn AT: . "In addition, the sources given by Bartrum for Dyddgu's alleged father Iorwerth ap Cadwgan are all late 16th century or later, so Iorwerth's existence is also uncertain. In my opinion, this link should be regarded as dubious."
=== WFP Visitations of Wales by Lewis Dwyn p ===
WFP Visitations of Wales by Lewis Dwyn p 332, 313
=== AKA-BIRTH-MARRIAGE: LDS Ancestor file - ===
AKA-BIRTH-MARRIAGE: LDS Ancestor file - Doc. AFN000468 Aka: Iowerth ap Cadwgon Birth: About 1020; ,Of,Radonshire,Wales Marriage: Gwenllian verch Aron
=== Iorwerthh
http://trees.ancestry.com/rd?f ===
Iorwerthh
http://trees.ancestry.com/rd?f=image&guid=7032527c-ed81-449f-9755-5c4bba32455f&tid=32497188&pid=353
=== Gwgon
http://trees.ancestry.com/rd?f=ima ===
Gwgon
http://trees.ancestry.com/rd?f=image&guid=5c5a673e-7d0b-4fad-94eb-6bb32f338b79&tid=32497188&pid=353
=== From Ancestral File (TM), data as of 2 J ===
From Ancestral File (TM), data as of 2 January 1996.
=== Ancestral File Number: HPGB-5M ===
Ancestral File Number: HPGB-5M
=== !#4568-v12-p896,897,911; ===
!#4568-v12-p896,897,911;
=== Marriage 1 Gwenllian Children Dyddgu fer ===
Marriage 1 Gwenllian Children Dyddgu ferch Iorwerth Sources: Title: " Welsh Genealogies AD 300-1400 & AD 1400-1500" P. C. Bartrun's, 8 vol and 18 vol Repository: Call Number: Media: Book Title: Stewart Baldwin Text: sbald@auburn.campus.mci.net (Stewart Baldwin) posted to GEN-MEDIEVAL-L-request@rootsweb.com on 26 Nov 1998 Subject: Llywelyn AT: . "In addition, the sources given by Bartrum for Dyddgu's alleged father Iorwerth ap Cadwgan are all late 16th century or later, so Iorwerth's existence is also uncertain. In my opinion, this link should be regarded as dubious."
=== !Internet Family Search Ancestral File a ===
!Internet Family Search Ancestral File as of 4-28-1999 AFN:HPGB-5M
Preferred Parents:
Father: Gwgan ap Idnerth Machudd, b. 1070 in Betws-yn-rhos, Denbighshire, Wales d. 1137 in Wales
Mother: Gwenlian verch Idnerth, b. 1070 in Wales d. 1137 in Wales
Family 1: Gwenllian Rhirid, b. 1102 in Wales d. 1155 in Wales
- Cynwrig ap Iorwerth, b. 1122 in Wales d. 4 MAY 1196 in Wales
Sources:
- Title: Legacy NFS Source: William ROKEHURSTE -
Author: A Dictionary of Eminent Welshmen; T R Roberts {1908}, Page number: Wales 13, p 41
Note: Source Media Type: Book
Page: Migrated from user-supplied source citation: urn:familysearch:source:2736743059
- Title: Legacy NFS Source: William ROKEHURSTE -
Author: Ancestral File (TM), The Church of Jesus Christ of Latter-day Saints, June 1998 (c), data as of 5 JAN 1998, Family History Library, 35 N West Temple Street, Salt Lake City, UT 84150 USA
Page: Migrated from user-supplied source citation: urn:familysearch:source:3243695014
- Title: Legacy NFS Source: Idnerth ap Cadwgon - death:
Author: World Family Tree Vol. 2, Ed. 1, Brøderbund Software, Inc., Release date: November 29, 1995, Not Given, Page number: Tree #1822
Note: death:
Customer pedigree.
Customer pedigree.
birth: 1020; Wales, United Kingdom
Customer pedigree.
Page: Migrated from user-supplied source citation: urn:familysearch:source:2554080695
- Title: The history of the princes, the lords marcher, and the ancient nobility of Powys Fadog, and the ancient lords of Arwystli, Cedewen, and Meirionydd by Lloyd, Jacob Youde William, 1816-1887 volume 5
Author: this was a google search for history books on wales and genealogy works
Publication: Name: https://archive.org/details/historyofprinces05lloy/page/240;
Note: these books there is 5 volumes have pedigrees and gives relationships and names and time eras for these families in wales.
^ lorwerthDrwyndwnwastheeldestsonofOwainGwynedd,who reigned over all Wales from 1137 to 1169. His son Llewelyn II, surnamed the Great, reigned fifty-six years, and died a.d. 1240, and was buried iu the abbey of Aberconwy. His great grandson Llewelyn III, was the last reigning sovereign of Wales.
Page: page 226 and 227 shows a pedigree of this family giving spouses names along with fathers names and where they lived and a time frame, also giving coat of arms, and other information
- Title: Legacy NFS Source: William ROKEHURSTE - birth: about 1020; Radnor, Wales, United Kingdom
Author: v11t4329.FTW, Not Given
Note: birth: about 1020; Radnor, Wales, United Kingdom
Source Media Type: Other
baptism:
Source Media Type: Other
baptism:
Source Media Type: Other
Endowment:
Source Media Type: Other
Endowment:
Source Media Type: Other
Seal to Parents:
Source Media Type: Other
Seal to Parents:
Source Media Type: Other
Source Media Type: Other
Page: Migrated from user-supplied source citation: urn:familysearch:source:2737222792
- Title: Family Tree & Genealogy Tools for Idnerth ap Cadwgan
Author: Was found on a google search and then was posted on another name in this line
Publication: Name: https://www.wikitree.com/genealogy/Cadwgan-Family-Tree-1;
Note: has a pedigree of this line
- Title: Legacy NFS Source: William ROKEHURSTE -
Author: History of Powys Fadog; J.Y.W. Lloyd {1885}, Page number: I:83, II:21
Page: Migrated from user-supplied source citation: urn:familysearch:source:2736743057
- Title: Observations on the Snowdon Mountains
Author: William Williams (1802). Observations on the Snowdon Mountains: With Some Account of the Customs and Manners of the Inhabitants : To which is Added a Genealogical Account of the Penrhyn Families. E. Williams.
Publication: Name: https://books.google.com/books?id=h2w9AAAAYAAJ&pg=PA173#v=onepage&q&f=false;
- Title: Legacy NFS Source: Iorwerth ap Cadwgon -
Author: Family History Library archive record (family group sheet)
Note: Source: The Royal Tribes of Wales, Wales 1, p. 136; Eminent Welshmen, Wales, 13, p. 41; Hist. of Powys Fadog, Wales 15, v. 1, p. 82; Heraldic Visitations of Wales, Wales 37, v. 1, p. 313; Montgomery Collec., Montg. Pub. A, v. 1, p. 236
Submitter: Elias Harmer Fam. Assn. % John P. Barlow
Source: The Royal Tribes of Wales, Wales 1, p. 125, 126; Eminent Welshmen, Wales 13, p. 41; Hist. of Powys Fadog, Wales 15, v. 1, p. 82; Heraldic Visitations of Wales, Wales 37, v. 1, p. 313
Submitter: Elias Harmer Fam. Assn. % John P. Barlow
Page: Migrated from user-supplied source citation: urn:familysearch:source:3244547632
- Title: Legacy NFS Source: William ROKEHURSTE -
Author: Ancestry Family Trees, Online publication - Provo, UT, USA: Ancestry.com. Original data: Family Tree files submitted by Ancestry members., Page number: Ancestry Family Trees
Note: This information comes from 1 or more individual Ancestry Family Tree files. This source citation points you to a current version of those files. Note: The owners of these tree files may have removed or changed information since this source citation was created.
Page: Migrated from user-supplied source citation: urn:familysearch:source:2743641295
- Title: The History of Wales
Author: Wynne, William; Price, John (1774). The History of Wales. T. Evans.
- Title: Legacy NFS Source: William ROKEHURSTE -
Author: Ancestral File (TM), The Church of Jesus Christ of Latter-day Saints, July 1996 (c), data as of 2 January 1996
Page: Migrated from user-supplied source citation: urn:familysearch:source:2737222795
- Title: Legacy NFS Source: William ROKEHURSTE -
Author: Ancestral File (TM), The Church of Jesus Christ of Latter-day Saints, June 1998 (c), data as of 5 JAN 1998
Page: Migrated from user-supplied source citation: urn:familysearch:source:2737222797
- Title: Legacy NFS Source: William ROKEHURSTE -
Author: Ancestral File (R), The Church of Jesus Christ of Latter-day Saints, Copyright (c) 1987, June 1998, data as of 5 January 1998, Family History Library, 35 N West Temple Street, Salt Lake City, Utah 84150 USA
Page: Migrated from user-supplied source citation: urn:familysearch:source:2941801618
- Title: Legacy NFS Source: William ROKEHURSTE -
Author: The Royal Tribes of Wales, 2nd Ed, Philip Yorke {1887}, Page number: 126
Page: Migrated from user-supplied source citation: urn:familysearch:source:2736743058
- Title: Legacy NFS Source: William ROKEHURSTE - birth: about 1020; Radnor, Wales, United Kingdom
Author: Ancestral File.LDS Church. Family History Library.
Note: birth: about 1020; Radnor, Wales, United Kingdom
Page: Migrated from user-supplied source citation: urn:familysearch:source:2198868384
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