Lleirwg Mawr Coel

Lleirwg Mawr's father is Coel of Meurig and his mother is Daughter of Cyllin. His paternal grandparents are Meurig Marius Gweirdd and Julia Victoria Prasutagus; his maternal grandfather is Cyllin ap Caradoc. He is the youngest of two children. He has a sister named Althildis of.