Cadwgan Fottwm Ap Ednyfed Ap Cadwgan Ddu

Cadwgan Fottwm's father was Ednyfed Ap Cadwgan Ddu Ap Llowarch Goch.  His paternal grandfather was Cadwgan Ddu Ap Llowarch Goch.  He was an only child.  Cadwgan Fottwm is no longer alive.

He had a biological daughter named Dyddu.