ORIGIN: Celtic [Welsh]
TYPE: God of war
INFORMATION: His mother is Don the Welsh mother goddess. He allegedly caused a war between Gwynedd and Dyfed. He visited the court of Pryderi, son of Rhiannon, in Dyfed, and stole his pigs. In the ensuing combat Gwydion used magic powers and slew Pryderi. He seems to have underworld links, hence the route taken by the dead, the Milky Way, was named Caer Gwydion.