Ednyfed Fychan ap Cynfrig was a Welsh nobleman who served as distain or seneschal of the Kingdom of Gwynedd in North Wales. Ednyfed held this position under the princes of Gwynedd for almost thirty years, and his tenure as distain appears to have coincided with the transformation of the office from one of domestic service to that of being the prince of Gwynedd's closest adviser and agent.