Riwal Mawr Marchou ap Riotham II
Riwal Mawr Marchou ap Riotham was born about 0475 in
Domnonee. Riwal Mawr Marchou ap Riotham's father is
Riotham ap Deroch I. His paternal grandfather is
Deroch ap Gwidol I. He had a sister named
Alma Pompea. He was the older of the two children. He died in 0520.