The Plantagenet Ancestry of King Edward III and Queen Philippa @ p. 16
The cited information was published by Morman Pioneer Genealogical Society, Salt Lake City, 1985 (Ref: p. 16) The author/originator was Moriarity, George Andrew.
References (2)
Parent Source:
The Plantagenet Ancestry of King Edward III and Queen Philippa
Individual:
Redburga d'Autun Queen of Wessex