Alan II (died 952), nicknamed Wrybeard or Twistedbeard (often given in French: Barbetorte) and Alain le Renard ("the Fox"), was Count of Vannes, Poher, and Nantes, and Duke of Brittany from 938 to his death. He was the grandson of King Alan the Great by Alan's daughter and her husband Mathuedoi, Count of Poher. He expelled the Vikings from Brittany after an occupation that lasted from 907 to about 939.