"Late pedigrees invented by Iolo Goch give his descent from Gerdan, a younger son of King Solor of Glywysing (Glamorgan). These appear to be corrupted versions of the pedigrees of the similarly named Glywys, King of Glywysing."
http://www.earlybritishkingdoms.com/bios/gorlois.html
He is married to Ygerna van Armorica.
They got married
Child(ren):
Sardog ap Pandoff van Wales | ||||||||||||||||||||||||||||||||||
Ygerna van Armorica |