Blood Royal: Issue of the Kings and Queens of Medieval England 1066-1399: The Normans and Plantagenets @ 42-43
The cited information was published by Heritage Books, 1996 (Ref: 42-43) The author/originator was T. Anna Leese.
References (2)
Parent Source:
Blood Royal: Issue of the Kings and Queens of Medieval England 1066-1399: The Normans and Plantagenets
Individual:
Heinrich V of Saxony and Bavaria