Events
Date of Birth: unknown.
Place of Birth: unknown.
Bartrum (Bleddyn ap Cynfyn 26) gives Gruffudd a number of 5 in his generational dating system, implying a birth date of, very roughly, about 1170.
Date of Death: unknown.
Place of Death: unknown.
Relationships
Father: Owain Brogyntyn ap Madog ap Maredudd.
This relationship is shown by Bartrum (Bleddyn ap Cynfyn 20) and given by Pierce.
Mother: uncertain.
It is uncertain which of Owain’s wives was Gruffudd’s mother.
Spouse: Janet, daughter of Sir William Say.
This relationship is shown by Bartrum (Bleddyn ap Cynfyn 26). Lloyd (6:17) suggests that Janet was of the family of the William de Say who was a son of Beatrice de Mandeville, but I don't know what evidence he was using.
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project. Most information below comes from Bartrum.)
Dafydd (living 1277, 1284).
References
Bartrum, Peter C., “Bleddyn ap Cynfyn 26” in An Electronic Version of Welsh Genealogies AD 300-1500.
[The sources that Bartrum cites for Gruffudd are: Peniarth 131 (72), written by Gutun Owain about 1480; Peniarth 129 (45, 74), copied about 1500 from a 1497 MS by Gutun Owain; and Peniarth 127 (25, 105, 151), written by Syr Thomas ap Ieuan ap Deicws between about 1510 and 1523; ]
Lloyd, Jacob Youde William. The History of the Princes, the Lords Marcher and the Ancient Nobility of Powys Fadog and the Ancient Lords of Arwystli, Cedewen and Meirionydd. (London: T. Richards, 1881-1887).
Pierce, Thomas Jones. “Owain Brogyntyn” in Welsh Biography Online.