Alan of Brittany

Alan of Brittany may refer to:


 * Alan I, King of Brittany (ruled 876–907), nicknamed the Great
 * Alan II, Duke of Brittany (ruled 938–952), nicknamed Wrybeard
 * Alan, Count of Nantes (988–90), may also have been duke of Brittany
 * Alan III, Duke of Brittany (ruled 1008–1040)
 * Alan IV, Duke of Brittany (ruled 1084–1119), nicknamed Fergant