Nielsen Hayden genealogy
J. Horace Round, "The Family of Ballon and the Conquest of South Wales." Studies in Peerage and Family History. Westminster: Archibald Constable & Co Ltd, 1901.
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Title J. Horace Round, "The Family of Ballon and the Conquest of South Wales." Studies in Peerage and Family History. Westminster: Archibald Constable & Co Ltd, 1901. Source ID S7285 Linked to (13) Baldwin VI
Mabilia de Ballon
Winebald de Ballon
Emma de Breteuil
Ralph I de Gael
Henry de Newmarch
William de Newmarch
Adeliza de Tosny
Roger I de Tosny
Osbern fitz Herfast
William fitz Osbern
St. William of Breteuil
Richilde of Hainaut