The epithet “Drwyndwn” means “flat-nose”.
Events
Date of Birth: unknown.
Date of Death: about 1174.
The date is given by Carr (ODNB).
Relationships
Father: Owain Gwynedd ap Gruffudd ap Cynan (died about 1170).
This relationship is shown by Bartrum (EVWG Gruffudd ap Cynan 4) and given by Carr (ODNB).
Mother: Gwladus ferch Llywarch ap Trahaearn.
This relationship is shown by Bartrum (EVWG Gruffudd ap Cynan 3) and given by Carr (ODNB).
Spouse: Marared ferch Madog ap Maredudd.
This relationship is shown by Bartrum (EVWG Gruffudd ap Cynan 4), and given by Maund (p. 116), by Stephenson (p. 50), and by Carr (ODNB).
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project.)
Llywelyn Fawr (died 1240) married Joan, illegitimate daughter of King John of England.
Adda.
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 Iorwerth are:
Mostyn MS. 117 -- dated to the last quarter of the 13th century
1. (“Llywelyn ap Gruffudd mab Llyweyln m. Ioruerth m. Owein m. Gruffuyd m. Kynan...”);
Jesus College MS. 20 -- dated to the last part of the 14th century
28. (“Llywelyn m. Iorwoerth m. Ewein Gwyned m. Gruffud m. Cynan.”
Achau Brenhinoedd a Thywysogion Cymru,
1. (a) (“Llywelyn ap Iorwerth drwyndwn m. Owain Gwynedd m. Gruffudd m. Kynan…”)
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…”
Bartrum, Peter C., “Gruffudd ap Cynan 3” and “Gruffudd ap Cynan 4” in An Electronic Version of Welsh Genealogies AD 300-1500. [The source Bartrum cites for Iorwerth is his own Early Welsh Genealogical Tracts.]
Carr, A.D. “Llywelyn ab Iorwerth (c. 1173-1240)”, in the Oxford Dictionary of National Biography. (Oxford University Press, 2004).
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):
11.1 Llywelyn ap Iorwerth ap Ywein ap Gruffyd ap Kynan ap Iago ap Idwal ap Meurig ap Idwall Foel ap Anarawt ap Rodri Mawr ap Essyllt ferch Kynan Dyndaethwy …[back to Adam]
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
Maund, Kari. The Welsh Kings (Tempus, 2000).
Stephenson, David. Medieval Powys: Kingdom, Principality and Lordships, 1132-1293. (The Boydell Press, 2016).
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).