Family: Earl of Northumbia Seward Biornsson / Aefflard of Bernica Countess Biornsson (F279)
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Earl of Northumbia Seward Biornsson (978-1055) |
Aefflard of Bernica Countess Biornsson (985-1060) |
Sibyl Fitzsiward Biornsson (1014-1040)  |