Nielsen Hayden genealogy
Family: William fitz Osbern / Adeliza de Tosny (F5122)
Roger I de Tosny (985-1038) 
|
Robert I de Stafford ( -1088)  |
| Radulf III de Tosny (1030-1102) |
| William fitz Osbern (1025-1071)
|
Adeliza de Tosny (1030-1066)
|
| St. William of Breteuil ( -1130) |
| Emma de Breteuil ( -1097) |