King of Alba from 1058 to 1093
Source (Wikipedia): Malcolm III of Scotland

Malcolm III was King of Alba from 1058 to 1093. He was later nicknamed “Canmore”. Malcolm’s long reign of 35 years preceded the beginning of the Scoto-Norman age. Henry I of England and Eustace III, Count of Boulogne were his sons-in-law, making him the maternal grandfather of Empress Matilda, William Adelin and Matilda I, Countess of Boulogne. All three of them were prominent in English politics during the 12th century.