Hubertus Martinus "Huub" Duyn (; born 1 September 1984 in Onderdijk, North Holland) is a Dutch former racing cyclist, who rode professionally between 2006 and 2019 for the , , , , , and teams. His best result in his career was winning the ParisâÂÂTours Espoirs in 2006. He currently works as a directeur sportif for UCI Women's WorldTeam .