William Thomas Beagan CD (born December 1, 1937) is a Canadian retired ice hockey administrator and ice hockey referee. He served in the Canadian Army for thirteen years, before refereeing in the National Hockey League (NHL) for two seasons. He was commissioner of the International Hockey League (IHL) from 1969 to 1978, the Ontario Major Junior Hockey League (OMJHL) from 1978 to 1979, the Eastern Hockey League from 1979 to 1981, and the Central Collegiate Hockey Association (CCHA) from 1985 to 1998. He was a partial owner and the general manager of the Toledo Goaldiggers from 1981 to 1985, and led the team to two Turner Cup championships.