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

Siward was born about 1020 in Denmark.  Siward's father was Biorn (Bjorn) ULFIUSSON (ESTRIDSEN) and his mother was Mrs. Biorn ULSIUSSON.  His paternal grandparents were Ulf THORGILSSON and Estrid (Margarete) SVENSDATTER.  He was an only child.  He died in 1055 in York, Yorkshire, England.


Siward's family with Aelfled (Elfleda) UNKNOWN

‌Siward and Aelfled (Elfleda) were married in a religious ceremony about 1033 in Northumberland, England.  They had a son named Waltheof.

Source/Citation
FamilySearch.com, Ancestral File v4.19

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