Waltheof, 1st Earl of Northumberland

Waltheof
Earl of Northumbria
Reign	1072–1076
Predecessor	Cospatrick of Northumbria
Successor	William Walcher
Died	31 May 1076 St. Giles's Hill, Winchester
Buried	Croyland Abbey
Spouse(s)	Judith of Lens
Father	Siward, Earl of Northumbria
Mother	Aelfflaed

Waltheof, 1st Earl of Northumbria (d. 31 May 1076) was the last of the Anglo-Saxon earls and the only English aristocrat to be executed during the reign of William I.

Waltheof was the second son of Siward, Earl of Northumbria. His mother was Aelfflaed, daughter of Ealdred, Earl of Bernicia, son of Uhtred, Earl of Northumbria. In 1054, Waltheof’s brother, Osbearn, who was much older than he, was killed in battle, making Waltheof his father’s heir. Siward himself died in 1055, and Waltheof being far too young to succeed as Earl of Northumbria, King Edward appointed Tostig Godwinson to the earldom.

Waltheof was said to be devout and charitable and was probably educated for a monastic life. Around 1065, however, he became an earl, governing Northamptonshire and Huntingdonshire. Following the Battle of Hastings he submitted to William and was allowed to keep his pre-Conquest title and possessions. He remained at William’s court until 1068.

When Sweyn II invaded Northern England in 1069, Waltheof and Edgar Aetheling joined the Danes and took part in the attack on York. He would again make a fresh submission to William after the departure of the invaders in 1070. He was restored to his earldom, and went on to marry William's niece, Judith of Lens. In 1072, he was appointed Earl of Northampton.

The Domesday Book mentions Waltheof ("Walleff"): "'In Hallam ("Halun"), one manor with its sixteen hamlets, there are twenty-nine carucates [~14 km²] to be taxed. There Earl Waltheof had an "Aula" [hall or court]. There may have been about twenty ploughs. This land Roger de Busli holds of the Countess Judith." (Hallam, or Hallamshire, is now part of the city of Sheffield)

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