Events
Date of Birth: unknown.
Place of Birth: unknown.
Bartrum gives Margred a number of 7 in his generational dating system, which implies a birth date of, very roughly, about 1230.
Date of Death: unknown.
Place of Death: unknown.
Relationships
Father: Griffri ap Cadwgon ap Meilir Eutun.
This relationship is shown by Bartrum (Tudur Trefor 22).
Mother: Jonet FitzWarin.
This relationship is shown by Bartrum (Tudur Trefor 22). Jonet is shown to be a daughter of Sir Fulk FitzWarin.
(possible) Spouse: Gruffudd Fychan ap Gruffudd Maelor ap Madog.
This relationship is shown by Bartrum (Tudur Trefor 22; Bleddyn ap Cynfyn 4). The sources for this relationship seem to be rather late.
Children:
Madog married (1) Margred ferch Rhys Ieuanc; married (2) Gwenllian ferch Ithel Fychan.
References
Bartrum, Peter C., “Bleddyn ap Cynfyn 4” in An Electronic Version of Welsh Genealogies AD 300-1500.
[The sources Bartrum cites for Margred are: Cardiff 2.1, by Dafydd Benwyn; and Harley 1969 by Griffith Hughes (living 1634-1665). ]