Mabon is identified with the Celtic god Maponos, and his mother Modron with the Celtic goddess Dea Matrona. Maponos, said to have been worshipped in Gaul and Britain, was the god of youth and is equated with the Roman Apollo. Dea Matrona, (‘divine mother goddess’) was goddess of the River Marne in Gaul. Divine mother goddesses were also worshipped as a triad, the Deae Matronae. As mentioned in the bookmark for page 11, Matrona has also been linked with Rhiannon who appears in ‘The First Branch of the Mabinogi’.
Mabon son of Modron is also referred to as one of Arthur’s counsellors in ‘Rhonabwy’s Dream’.