*Trahaearn "Goch" ap Madog
born about 1250 Llyn, Caernarvonshire, Wales
died after 1273 Tower of London, London, Middlesex, England

father:
*Madog ap Rhys
born about 1225 Radnorshire, Wales
died after 1292

mother:
*Tanglwyst verch Gronwy
born about 1230 Gwrinydd, Glamorgan, Wales
(end of information)..

siblings:
unknown

spouse:
*Gwerful verch Madog
born about 1257 Maelienydd, Radnorshire, Wales

children:
*Dafydd "Goch" ap Trahaearn
born about 1275 Penllech, Cymydmaen, Caernarvonshire, Wales
died after 1324 Bardsey Isle, Aberdaron, Caernarvonshire, Wales

biographical and/or anecdotal:

notes or source:
LDS
From the shire of origin it appears *Madog ap Rhys could be the father of
*Gwerful verch Madog instead of *Trahaearn ap Madog.