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Male Siward Bjornsson Earl of Northumbria  Click to view Siward Bjornsson Earl of Northumbria  in the family tree

Siward Bjornsson was born about 1020 in Denmark.  Siward Bjornsson's father was Bjorn Ulfiusson.  His paternal grandparents were Ulf Thorgilsson  and Estrid Margarete Svendsdatter.  He was an only child.  He died in 1055 in York,Yorkshire,England.


Siward Bjornsson's first family with Judith De Champagne

They had a son named Waltheof II.


Siward Bjornsson's second family with Ælflaed (Elfleda) UNKNOWN

They had a son named Waltheof II.

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