‘Casnar the Ruler’, ‘Casnar the Lord’
A Welsh ruler who was the father of Arthur’s warrior Llara in Rhonabwy and Culhwch.
Pwyll calls him
one of the nobles of the island,
and the great-grandfather of Kigva (Cigfa), wife of Pryderi.
Source
Breudwyt Rhonabwy | 13th century
Culhwch and Olwen | Late 11th century