Family: Earl of Northumberland Waltheof / Judith of Lens (F1178)
Siward Bjornsson (1020-1055) 
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Aelflaed of Bernicia (1031- )
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| Lambert of Lens-Boulogne (1025- )
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| Countess of Aumale Adeliza (1029- )
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| Earl of Northumberland Waltheof (1046-1076)
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| Judith of Lens (1054- )
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Maud of Northumberland (1072-1130)  |
