Cadfan ap Cynan of Dumnonia

Cadfan ap Cynan of was born in 0325.  Cadfan ap Cynan of's father was Conan Meriadog and his mother was Ursula verch Dynod.  His paternal grandfather was Caradawc II of Ewyas; his maternal grandfather is Dynold of Dumnonia. He had two half-brothers named UNKNOWN and Gradlon Mawr of.  He died after 0360.

He had a biological daughter named Ystradwal verch.