The name Cathal is derived from Old Irish elements: 'cath' meaning 'battle' and 'fal' meaning 'rule'. It signifies a ruler in battle or a battle leader. This name was notably borne by a 7th-century Irish saint and several Irish kings, reflecting its historical significance and noble connotations. The name has been Anglicized in various forms, including Charles, although the latter originates from a different linguistic root.