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

Siward's father was Bjorn Estriden Ulsiusson.  His paternal grandparents were Ulf (Ulsius) Thorkilsson Jarl of Denmark and Estrith (Margaret) of Denmark.  He was an only child.  Siward is no longer alive.

Family Details of Siward's family with Aelfled Bernicia

Family Details of Siward's family with Elfreda Northumbria

Source/Citation
11615-2.ftw

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