Gruffydd ap Madog of Llan Uwch Llyn Tegid 1
- Marriage (1): Alice verch Bleddyn Vychan ap Bleddyn of Havod Unnos
- Marriage (2): Janet verch Cynvelyn ap Dolphwyn
From History of Powys Fadog, pp. 120-121:
"Gruffydd ab Madog of Llan Uwch Llyn Tegid, married, according to the Harl. MS. 2288, Alice, daughter of Bleddyn Vychan ab Bleddyn of Havod Unnos (see 'Palau'), who is there stated to have been the mother of all his children. According to other accounts, he married Janet, daughter of Cynvelyn ab Dolphwyn, Lard of Manavon (azure, a lion passant argent), who was the mother of Ieuan, and that afterwards he married Gwellian, daughter of Ieuan ab Howel ab Meredydd ab Howel ab Madog ab Cadwgan ab Elystan Glodrudd, Prince of Fferlis. By one or other of these three ladies, Gruffydd had issue--1, Ieuan, of whom presently; 2, Howel y Gadair of Cádair Benllyn, of whom presently; 3, Rhys, ancestor of the Joneses of Llandyrnog and Helygen in Tegeingl; 3, Goronwy of Penllyn, ancestor of the Lloys of Y Ddwyvaen in Dinmael, the Lloyds of Glanhavon in Mochnant, and of Trevor Hall in Nanheudwy, and of Lewys Gwynn ab Cadwaladr of Llan y Cil; and 4, Gruffydd of Trevgoed."
Gruffydd married Alice verch Bleddyn Vychan ap Bleddyn of Havod Unnos, daughter of Bleddyn Vychan ap Bleddyn of Havod Unnos and Unknown.
Gruffydd next married Janet verch Cynvelyn ap Dolphwyn.