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

Siward was born about 1020 in Denmark.  Siward's father was Bjorn Ulfiusson.  His paternal grandparents were Ulf Thorgilsson and Estrid Margarete Svendsdatter. He had a brother named Asmund.  He was the older of the two children.  He died in 1055 in York, Yorkshire, England.  He was buried in Galmanho Abby, York, Yorkshire, England.


Siward's family with Ælflaed Elfleda of Bernicia

They had two sons and a daughter, named II, Osbeorne of and Sybil of.

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