Events
Date of Birth: unknown.
Place of Birth: unknown.
Bartrum given Iorwerth a number of 3 in his generational dating system, which implies a birth date of, very roughly, about 1100.
Date of Death: unknown.
Place of Death: unknown.
Relationships
Father: Cynon ap Llywarch Howlbwrch.
This relationship is shown by Bartrum (Llywarch Howlbwrch 1).
Mother: a daughter of Cadwallon ap Cadrod, arglwydd Mochnant.
This relationship is shown by Bartrum (Llywarch Howlbwrch 1).
Spouse: a daughter of Ithel ab Einudd.
This relationship is shown by Bartrum (Llywarch Howlbwrch 1).
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project. The information below comes from Bartrum.)
Llywarch Goch married Tangwystl ferch Llywarch; also married Gwladus ferch Heilin.
References
Bartrum, Peter C., “Llywarch Howlbrwch 1” in An Electronic Version of Welsh Genealogies AD 300-1500.
[The sources Bartrum cites for Iorwerth are: The Survey of the Honour of Denbigh, 1334 (81, 97, 128); Peniarth 131 (66), written early in the reign of Henry VIII; Peniarth 127 (62), written by Syr Thomas ap Ieuan ap Deicws between about 1510 and 1523; Peniarth 128 (265a), “Llyfr Edward ap Roger”, written before 1582; Peniarth 138 (78, 90), written by Thomas ap Llywelyn ab Ithel of Bodfari about 1562; Peniarth 176 (107), Peniarth 177 (317), Peniarth 178 part 1 (42), and Peniarth 135 (399) by Gruffudd Hiraethog (died 1564).]