Events
Date of Birth: about 1173.
(possible) Place of Birth: Dolwyddelan in Nant Conwy.
The date and place are given by Carr (ODNB).
Date of Death: 11 April 1240.
Place of Death: Aberconwy Abbey.
The date and place are given by Carr (ODNB). The death is recorded in Brut y Tywysogion s.a.1240 and in Annales Cambriæ s.a. 1240.
Date of Burial: 1240.
Place of Burial: Aberconwy Abbey.
The burial is recorded in Brut y Tywysogion s.a.1240.
Relationships
Father: Iorwerth Drwyndwn ab Owain Gwynedd ap Gruffudd (died about 1174).
This relationship is shown by Bartrum (EVWG Gruffudd ap Cynan 4) and given by Carr (ODNB).
Mother: Marared ferch Madog ap Maredudd.
This relationship is shown by Bartrum (EVWG Gruffudd ap Cynan 4) and given by Carr (ODNB).
Spouse: Joan, illegitimate daughter of King John of England. Married 1205.
This relationship is shown by Bartrum (EVWG Gruffudd ap Cynan 4), and given by Carr (ODNB), and by Wilkinson.
Concubine: Tangwystl ferch Llywarch Goch.
This relationship is shown by Bartrum (EVWG Gruffudd ap Cynan 4) and given by Carr (ODNB).
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project. There is much disagreement about who were the mothers of the children. Most information below comes from Bartrum and Carr.)
Children (by Joan):
Dafydd (died 1246) married Isabella de Briouze.
Elen married (1) John the Scot, earl of Chester; married (2) Robert de Quincey.
Susanna.
Children (by Tangwystl):
Gruffudd (died 1244) married (1) Senena ferch Caradog; married (2) Rhanullt ferch Rheinallt; married (3) Catrin ferch Cynchwr of Ireland.
Gwenllian (died 1291) married William de Lacy.
Children (by Joan or Tangwystl):
Angharad married Maelgwn Ieuanc.
Margred married (1) John de Briouze in 1219; married (2) Walter Clifford.
Gwladus Ddu (died 1251) married (1) Reginald de Braose in 1215; married (2) Ralph II Mortimer.
Children (by an unknown mother):
Angharad married Philip ab Ifor.
A daughter married William Caentwn.
Tegwared y Baiswen married Gwenllian ferch Ednyfed Fychan.
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 Llywelyn 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.”
29. (“Llewelyn m. Marereda merch Madawc m. Maredud. (Brawt oed Varedud y Rees gryc.)
Achau Brenhinoedd a Thywysogion Cymru,
1. (a) (“Llywelyn ap Iorwerth drwyndwn m. Owain Gwynedd m. Gruffudd m. Kynan…”)
(b) (“Mam Llywelyn ap Iorwerth: Marvred verch Madawg ap Meredydd ap Bleddin ap Kynvyn ap Gwerystan…”);
Brut y Tywysogion (175 f).
Bartrum, Peter C., “Gruffudd ap Cynan 4” in An Electronic Version of Welsh Genealogies AD 300-1500. [The sources Bartrum cites for Llywelyn are Brut y Tywysogion and 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]
11.1.1 Mam Llewelyn: Mararet ferch Madawg m. Maredudd m. Bledyn m. Kynfyn m. Gwerystan ...
Wilkinson, Louise. "Joan, Wife of Llywelyn the Great" in Thirteenth Century England X (The Boydell Press, 2005), pp. 81-94.
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).