Events
Date of Birth: unknown.
Place of Birth: unknown.
Bartrum gives Gruffudd a number of 6 in his generational dating system, which implies a birth date of, very roughly, about 1200.
Date of Death: unknown.
Place of Death: unknown.
Relationships
Father: Hywel ap Trahaearn ap Gwgon.
This relationship is shown by Bartrum (Bleddyn ap Maenyrch 1).
Mother: Nest ferch Gruffudd.
This relationship is shown by Bartrum (Bleddyn ap Maenyrch 1).
Spouse: Gruffudd ab Ednyfed Fychan ap Cynwrig.
This relationship is shown by Bartrum (Marchudd 14; Bleddyn ap Maenyrch 1).
Children:
Sir Hywel (died 1282) married Tangwystl ferch Dafydd Goch.
References
Bartrum, Peter C., “Bleddyn ap Maenyrch 1” in An Electronic Version of Welsh Genealogies AD 300-1500.
[The sources that Bartrum cites for Gwenllian are: “Plant yr Arglwydd Rhys” 2b, copied about 1500 from a MS probably composed in the mid to late 1300s, and Peniarth 131 (221), written by Ieuan Brechfa about 1500. Bartrum comments on “Plant yr Arglwydd Rhys” that it contains palpable errors and must be treated with caution. The relevant passage is: “Gwraic Gruffudd ap Ednyfed oedd Wenllian verch Howel ap Trahayarn ap Gwgan ap Bleddyn ap Maenyrch o Vrychainioc.”]