Matilda, Countess of Northampton ( 1074–1130) or Maud, was Queen of Alba as the wife of King David I. She was the great-niece of William the Conqueror and the granddaughter of Earl Siward.
Biography
Matilda was the daughter of Waltheof of Northampton, the Anglo-Saxon Earl of Huntingdon and Northampton, and his French wife Judith of Lens. Her father was the last of the major Anglo-Saxon earls to remain powerful after the Norman conquest of England in 1066, and the son of Siward, Earl of Northumbria. Her mother was the niece of William the Conqueror, which makes Matilda his grand-niece. Through her ancestors the Counts of Boulogne, she was also a descendant of Alfred the Great and Charles the Bald and a cousin of Godfrey of Bouillon.
She was married to Simon de Senlis (or St Liz) in about 1090. Earlier, William had tried to get Maud's mother, Judith, to marry Simon. He received the honour of Huntingdon (whose lands stretched across much of eastern England) probably in right of his wife from William Rufus before the end of the year 1090.
She had three known children by him: