Anglicized form of Scottish Gaelic
Máel Coluim, which means
"disciple of Saint Columba". This was the name of four kings of Scotland starting in the 10th century, including Malcolm III, who became king after killing
Macbeth, the usurper who had defeated his father
Duncan. The character Malcolm in Shakespeare's tragedy
Macbeth (1606) is loosely based on him. Another famous bearer was Malcolm X (1925-1965), an American civil rights leader.