Alexander I (c. 1078 - April 23, 1124), king of Scotland, was the fourth son of Malcolm Canmore by his wife (St) Margaret, grand-niece of Edward the Confessor.
On the death of his brother Edgar in 1107 he succeeded to the Scottish crown; but, in accordance with Edgar's instructions, he inherited only a part of its possessions. By a partition, the motive of which is not quite certain, the districts south of the Forth and Clyde were erected into an earldom for Alexander's younger brother, David.
Alexander, dissatisfied, sought to obtain the whole, but without success. A curious combination of the fierce warrior and the pious churchman, he manifested the one aspect of his character in his ruthless suppression of an insurrection on behalf of the descendants of Lulach in his northern dominion (thus gaining for himself the title of "the Fierce"), the other in his munificent foundation of bishoprics and abbeys. Among the latter were those of Scone and Inchcolm.
In 1107, he married Sybilla, an illegitimate daughter of Henry I of England. The exact date and the location of the marriage are not recorded. Sybilla died in unrecorded circumstances near a lake on the Island of the Woman (Eilean nam Bain) in July, 1122 . The marriage produced no children. Alexander's strong championing of the independence of the Scottish church involved him in struggles with both of the English metropolitan sees. He died on April 23, 25 or 27, 1124; his brother, David I succeeded him.