According to Welsh sources, the father of Igraine (Eigyr), the mother of Arthur. Amlawdd is also credited with being the father of Goleuddydd, Rieingulid who were, respectively, the mothers of Arthur's cousins, Culhwch and Illtyd. Amlawdd's wife was called Gwen or Gwenn.

The word wledig is a title meaning, roughly, 'chief', perhaps used as a Celtic translation of the Latin title protector, and would appear to indicate Amlawdd's position within the community.