Ednyfed Fychan

Ednyfed Fychan (c. 1170 – 1246), full name Ednyfed Fychan ap Cynwrig, was a Welsh warrior who became Seneschal to the Kingdom of Gwynedd in Northern Wales, serving Llywelyn the Great and his son Dafydd ap Llywelyn. Ednyfed claimed descent from Marchudd ap Cynan, Lord of Rhos, 'protector' of Rhodri Mawr, King of Gwynedd. He was the patrilineal ancestor of Owen Tudor and thereby of the Tudor dynasty.

As is usual with medieval orthography, a variety of spellings were used for his name in medieval sources, such as Vychan, Idneved Vachan, and Edeneweth Vakan.