Siward BIORNSSON, EARL OF NORTHUMBERLAND
He married Aelfled (Elfleda) of Bernicia, Countess of Northumberland Abt 1033 at of Northumberland, England . Aelfled (Elfleda) of Bernicia, Countess of Northumberland was born at of Bernicia, Northumbria, England Abt 1031 daughter of Aldred of Bernicia, Earl of Northumbria and Mrs. Aldred of Bernicia .
They were the parents of 3
children:
Waltheof, Earl of Northumberland, Earl of Huntingdon
born Abt 1046.
Sybil of Northumberland
born Abt 1048.
Osbeorne of Northumberland
born Abt 1050.
Siward Biornsson, Earl of Northumberland died 1055 at York, Yorkshire, England .