Nielsen Hayden genealogy
Family: Robert le Vavasour / (Unknown) de Birkin (F1384)
William le Vavasour ( -1185) |
Adam de Birkin ( -1185) 
|
Maud de Cauz ( -1224)
|
| Robert le Vavasour ( -1227)
|
Maud le Vavasour ( -1225)  |