MALCOLM III  . (d . 1093), called Canmore or the " large-headed," was a son of King Duncan I., and became king after the defeat of the usurper Macbeth in July 1054, being crowned at Scone in April 1057 . Having married as his second wife, (St) Margaret (q.v.), a sister of EdgarIEtheling, who was a fugitive at his court, he invaded England in 1070 to support the claim of Edgar to the English throne, returning to Scotland with many captives after harrying Northumbria . William the Conqueror answered this attack by marching into Scotland in 1072, where-upon Malcolm made peace with the English king at Abernethy and " was his man." However, in spite of this promise he ravaged the north of England again and again, until in 1o91 William Rufus invaded Scotland and received his submission . Then in 1092 a fresh dispute arose between the two kings, and William summoned Malcolm to his court at Gloucester . The Scot obeyed, and calling at Durham on his southward journey was present at the foundation of Durham Cathedral . When he reached Gloucester Rufus refused to receive him unless he did homage for his kingdom; he declined and returned home in high dudgeon . Almost at once he invaded Northumbria, and was killed at a place afterwards called Malcolm's Cross, near Alnwick, on the 13th of November 1093 . Four of Malcolm's sons, Duncan II., Edgar, Alexander I., and David I., became kings of Scotland; and one of his daughters, Matilda, became the wife of Henry I. of England, a marriage which united the Saxon and the Norman royal houses .