As Seneschal
In 1215, he succeeded Gwyn ab Ednywain as seneschal ("distain" in Welsh) of Gwynedd, roughly equivalent to Chief Councillor or Prime Minister. His titles included Lord of Bryn Ffanigl, Lord of Criccieth, and Chief Justice. He was involved in the negotiations leading to the Peace of Worcester in 1218 and represented Llywelyn in a meeting with the king of England in 1232.
Ednyfed had estates at Bryn Ffanigl Isaf near Abergele and at Llandrillo-yn-Rhos, now a suburb of Colwyn Bay. These were the palace of Llys Euryn, on the hill of Bryn Euryn, and Rhos Fynach, on the seashore below it. He also held lands in Llansadwrn and presumably also on Anglesey, where his son had his seat.
Ednyfed was married twice, first to Tangwystl Goch ferch Llywarch of Menai (but perhaps of Rhos?), the daughter of Llywarch ap BrĂ¢n, then to Gwenllian, daughter of the prince Rhys ap Gruffydd of Deheubarth (order incorrect?).
Ednyfed probably went on a crusade to the Holy Land around 1235, although the evidence is not conclusive.
Read more about this topic: Ednyfed Fychan