Events
Date of Birth: unknown.
Date of Death: unknown.
Relationships
Father: Trahaearn ap Caradog (died 1081).
This relationship is shown by Bartrum (EVWG Trahaearn ap Caradog 1) and by given by Pryce (Acts Table 2). Llywarch is recorded as the son of Trahaearn in Brut y Tywysogion s.a. 1106, 1107, 1110, and 1121.
Mother: uncertain.
Bartrum (EVWG Trahaearn ap Caradog 1) shows Nest ferch Gruffudd ap Llywelyn, but Baldwin (LaI) regards this as dubious.
Spouse: uncertain.
Bartrum (EVWG Trahaearn ap Caradog 6) shows Dyddgu ferch Iorwerth ap Cadwgon ab Elystan Glodrudd, but Baldwin (LaI) regards this as dubious.
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project.)
Gwladus married Owain Gwynedd.
Robert (died 1171) married Dyddgu ferch Madog.
Elen married Seisyll ap Llywelyn.
Iorwerth (died 1130).
Maredudd (died 1129).
Madog (died 1130).
References
Baldwin, Stewart. Llywelyn ap Iorwerth ancestor table. (Hosted at Rootsweb.ancestry.com. Accessed 18 May 2014).
Bartrum, Peter C (ed.) Early Welsh Genealogical Tracts. (Cardiff: University of Wales Press, 1968).
The sources Bartrum gives for Llywarch include:
Achau Brenhinoedd a Thywysogion Cymru,
2. Plant Ywein Gwynedd
(a) “Ioruerth a Maelgwn a Gwenlliant, mam Wenwynwyn ap Owain Kyveiliawg, plant Owain Gwynedd. Ai Mam oedd Wladus verch Lywarch ap Tryhaearn ap Kyradawc ap Gwyn ap Gollwyn ap Ydnywain ap Bleddynt…”
14. “Maredudd ap Rrotpert ap Llowarch ap Trehaiarn ap Karadawg ap Gwnn ap Gollwyn ap Ednywain ap Bleddyn. I vam oedd Ddyddgv verch Madawc ap Idnerth ap Kadwgon ap Elystan glodrydd.”
Brut y Tywysogion (59 f).
Bartrum, Peter C., “Gruffudd ap Cynan 1” and “Gruffudd ap Cynan 3” in An Electronic Version of Welsh Genealogies AD 300-1500. [The sources Bartrum cites for Llywarch are Brut y Tywysogion and his own Early Welsh Genealogical Tracts.]
Guy, Ben. Medieval Welsh Genealogy. (The Boydell Press, 2020).
From Guy’s critical edition of the Llywelyn ab Iorwerth genealogies, which were based on an archetype created no later than the first half of the fourteenth century from an original compilation dating to the early thirteenth century, partly based on earlier written sources (Note that Guy is striving for textual rather than genealogical accuracy):
12. Plant Ywain Gwyned:
12.1 Iorwerth a Maelgwn a Gwenlliant mam Wenwynwyn ap Ywain Kyfeiliawg, plant Ywain Gwyned, a Gwladus oed eu mam, ferch Llewarch ap Trehayarn ap Karadawg ap Gwynn ap Gollwyn ap Ednywain ap Bledynt ap Bledrus ap Kynawg Mawr ap Iorwerth Hirvlawt ap Tegonwy ap Teon
33. Gwehelieth Arwystli:
32.2 Maredyd m. Rotbert <ab Llywarch> m. Trahayarn m. Karadawg.
Pryce, Huw. “Owain Gwynedd (d. 1170)”, in the Oxford Dictionary of National Biography. (Oxford University Press, 2004).
Pryce, Huw. The Acts of the Welsh Rulers 1120 - 1283 (Cardiff: University of Wales Press, 2005)
Williams ab Ithel, John (ed.). Annales Cambriæ (London: Longman, Green, Longman, and Roberts; 1860).
Williams ab Ithel, John. Brut y Tywysogion; or, The Chronicle of the Princes (London: Longman, Green, Longman, and Roberts; 1860).