Family: Siward BIORNSSON, Earl of Northumberland / Aelfled (F935)
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 | Mrs-Biorn ULSIUSSON (980- ) |
| Miss BIORNSSON (1010- ) |
 | Asmund BJORNSEN (1047-1065) |
| Ealdred, Earl of Northumbria (994-1038)
|
| Algitha (1033- )  |
| Siward BIORNSSON, Earl of Northumberland (1020-1055)
|
| Aelfled (1031- )
|
| Waltheof II (1045-1076) |
| Sybil, Queen of Scotland (1048- ) |
| Osbeorn (1050- ) |