Matilda, Countess of Northampton
Matilda, Countess of Northampton (c. 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.
Source: Wikipedia — Matilda, Countess of Northampton (CC BY-SA 4.0)