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Male Siward Biornsson Click to view Siward Biornsson in the family tree

Siward was born in 1020.  Siward's father was Biorn Ulsiusson.  His paternal grandparents were Ulf Thorgilsson and Estrid.  He was an only child.  He died at the age of 35 in 1055.

Family Details of Siward's family with Aelfled

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