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Male Osbeorne Siwardsson Click to view Osbeorne Siwardsson in the family tree

Osbeorne was born about 1050 in Of, Northumberland, England.  Osbeorne's father was Danish Earl Of Northumbria Siward Biornsson Northumberland Danish Earl Of Northumbria and his mother was [Countess Of Nor Aelfled (Elfleda) Of Bernicia [Countess Of Nor.  His paternal grandparents were Jarl Of Denmark Biorn Biorn Jarl Of Denmark/Jarl Of Denmark/Ulfiusson and Mrs. Biorn 970 Ulfiusson; his maternal grandparents were [Earl Of Northum Aldred Of Bernicia [Earl Of Northum and Mrs. Edgina (Nmn-Aldred) Bernicia. He had a brother and a sister, named Waltheof II Earl Of Huntingdon & and Aelflaed Of.

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