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Male Siward Bjonssson, Earl of NORTHUMBRIA Click to view Siward Bjonssson, Earl of NORTHUMBRIA in the family tree

Siward Bjonssson, Earl of was born about 0995.  Siward Bjonssson, Earl of is no longer alive.

Siward Bjonssson, Earl of's family

He had a biological daughter named Aelflaed Sybilla of.