King Alexander I 
Ruled Scotland 1107-1124 When King Edgar died, he bequeathed Scotland north of the Forth to his brother Alexander, but gave the sovereignty of Lothian and Cumbria to their younger brother David. Born around 1077, Alexander was the fifth son of Malcolm III and St Margaret. Named after Pope Alexander II, he was described by one chronicler as 'a lettered and godly man', but he was also known as 'Alexander the Fierce' after dealing ruthlessly with an uprising in Moray. In 1114 he served as leader of a contingent in Henry I of England's campaign against the Welsh (he was technically a vassal of the English king). Alexander married Henry's illegitimate daughter Sybilla (Henry had married Alexander's sister Maud). Sybilla died suddenly in 1122, leaving no children, and Alexander died at Stirling on 23 April 1124. Alexander I (1107-1124)
The son of King Malcolm III Canmore (reigned 1058-93), Alexander succeeded to the throne upon the death of his brother King Edgar (ruled 1097-1107). In accordance with Edgar's instructions, Alexander allowed his younger brother and heir, David, to rule southern Scotland.
Alexander probably acknowledged King Henry I of England as his overlord. He married Henry's illegitimate daughter, Sibylla, and in 1114 he led a Scottish contingent in Henry's Welsh campaigns. Nevertheless, Alexander strove to preserve the independence of the Scottish Church from the English Church and to assert his will over the Scottish bishops. The outcome of these struggles was inconclusive at his death. He was succeeded by David (David I, 1124-53), who ruled over the whole of Scotland