Sigurd BJORNSSON, Earl of Northumberland 
Sigurd's father was Bjorn Estridsen ULFSSON. He was an only child. He died in 1055 in Yrok, Yorkshire, England.
They had a son named Waltheof II Earl of .
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Children
Waltheof II Earl of HUNTINGTON
Waltheof II Earl of was born in 1046 in Northumberland, England. He died at the age of 30 on May 31st, 1076 in Beneaded at Winchester, Hampshire England.