Family: Siward Bjornsson / Aelflaed of Bernicia (F1423)
Bjorn Ulfuisson (1000-1045) 
|
| Aldred of Bernicia (994-1039) |
| Siward Bjornsson (1020-1055)
|
Aelflaed of Bernicia (1031- )
|
Earl of Northumberland Waltheof (1046-1076)  |
| Bjorn Ulfuisson (1000-1045)
|
| Aldred of Bernicia (994-1039) |
| Siward Bjornsson (1020-1055)
|
| Aelflaed of Bernicia (1031- )
|
| Earl of Northumberland Waltheof (1046-1076) |
