Events
Date of Birth: unknown.
Place of Birth: unknown.
Bartrum (Bleddyn ap Cynfyn 26) gives Madog a number of 6 in his generational dating system, implying a birth date of, very roughly, about 1200.
Date of Death: unknown.
Place of Death: unknown.
Relationships
Father: Gruffudd ab Owain Brogyntyn ap Madog.
This relationship is shown by Bartrum (Bleddyn ap Cynfyn 26).
Mother: Janet, daughter of Sir William Say.
This relationship is shown by Bartrum (Bleddyn ap Cynfyn 26).
Spouse: unknown.
Children:
Iorwerth married Lleucu ferch Llywelyn.
References
Bartrum, Peter C., “Bleddyn ap Cynfyn 26” in An Electronic Version of Welsh Genealogies AD 300-1500.
[The sources that Bartrum cites for Madog are: Peniarth 129 (50, 74, 92), copied about 1500 from a 1497 MS by Gutun Owain; and Peniarth 127 (25, 151), written by Syr Thomas ap Ieuan ap Deicws between about 1510 and 1523.]