Ada de Warenne, Queen Mother of Scotland

Ada de Warenne was born around 1120, daughter of William de Warenne 2nd Earl of Surrey and Isabel de Vermandois. Through her mother, she was a great-granddaughter of Henry I of France and half-sister to twins Waleran and Robert de Beaumont, Count of Meulan and 2nd Earl of Leicester, respectively, and Hugh de Beaumont, 1st Earl of Bedford. Her niece, Isabel de Warenne, would marry William of Blois, the younger son of King Stephen and, following his death, Hamelin, half-brother of Henry II of England. Ada’s family connections were of the highest quality in the Anglo-Norman world.

As a consequence, Ada’s future marriage became an international concern. On 9 April 1139, a peace treaty was concluded between King Stephen of England and King David I of Scots. Primarily negotiated by Stephen’s wife, Queen Matilda – King David’s own niece – the…