Siward Biornsson 
Siward was born in 0990 in Northumberland, Denmark. Siward's father was Aldred Northumbria. His paternal grandparents were Uchtred 'The Bold' Northumbria and Ecqfrida Wessex. He was an only child. He died at the age of 65 in 1055 in York, Yorkshire, England.
Details of Siward's family with Elfreda Northumbria
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