Family: Earl of Northumbia Seward Biornsson / Aefflard of Bernica Countess Biornsson (F4586)
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Male
Earl of Northumbia Seward Biornsson
Birth 978 Perth, Perthshire, Scotland 
Death 1055 Yorkshire, England Burial Marriage Father Mother
Female
Aefflard of Bernica Countess Biornsson
Birth 985 Northumberland, England Death 1060 England Burial Father Mother
Female
Sibyl Fitzsiward Biornsson
Birth 1014 Northumberland, England Death 1040 Iona, Argyll, Scotland Burial Spouse King of Alba Duncan I MacCrinan | F4551 Marriage 1030 Scotland