Waltheof Siwardsson Earl of Northumbria
- Born: 1045, Huntingdon, Huntingdonshire, England
- Marriage (1): Judith de Lens before 1072 in England
- Died: 31 May 1076, Winchester, Hampshire, England aged 31
- Buried: 14 Jun 1076, Crowland, Lincolnshire, England
FamilySearch ID: LDSS-ZMW.
Waltheof married Judith de Lens, daughter of Lambert de Boulogne comte de Lens and Adelaide de Normandie, before 1072 in England. (Judith de Lens was born about 1054 in Normandy, France, died on 3 Aug 1090 in Gournay, Manche, Normandy, France and was buried in 1090 in Aumale, Seine-Maritime, Normandy, France.)
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