Clan Macdonald of Clanranald, also known as Clan Ranald is a Scottish clan and a branch of Clan Donald, one of the largest Scottish clans. The founder of the Macdonalds of Clanranald is Reginald, 4th great-grandson of Somerled. The Macdonalds of Clanranald descend from Reginald's elder son Allan and the MacDonells of Glengarry descend from his younger son Donald. The clan chief of the Macdonalds of Clanranald is traditionally designated as The Captain of Clanranald and today both the chief and clan are recognised by the Lord Lyon King of Arms, the heraldic judge in Scotland.