Eleazer Williams (May 1788 – August 28, 1858) was a Canadian-American clergyman and missionary of Mohawk descent. In later years he claimed that he was the French "Lost Dauphin" and was a pretender to the throne of France. Williams was born in Sault St. Louis, Quebec, Canada, the son of Thomas Williams, and was educated at Dartmouth College. He published tracts and a spelling book in the Iroquois language, translated the Book of Common Prayer into Iroquois, and wrote a biography of Chief Te-ho-ra-gwa-ne-gen (Thomas Williams).