Mongfind (or
Mongfhionn in modern Irish)—meaning "fair hair" or "white hair"—was the wife, of apparent
Munster origins, of the legendary
Irish High King Eochaid Mugmedón and mother of his eldest three sons,
Brión,
Ailill and
Fiachrae, ancestors of the historical
Connachta, through whom she is an ancestor of many
Irish and European nobility today. She was the sister of
Crimthann mac Fidaig,
King of Munster and the next High King of Ireland, whom she is said to have killed with poison in the attempt to have the kingdom for her sons. She drank the same to convince him, and died soon after at
Samhain, becoming a goddess of sorcery.