Arthen ap Seisyll

Arthen ap was born in 0730 in Ceredigion, Wales.  Arthen ap's father was Seisyll ap Clydog.  His paternal grandfather was Clydog ap Arthlwys.  He was an only child.  He died at the age of 77 in 0807.

He had a biological son named Dyfnwallon ap.