John Gambril (Francis) Nicholson (1866–1931) was an English school teacher, poet, and amateur photographer. He was one of the Uranians, a clandestine group of British men who wrote poetry idealizing the beauty and love of adolescent boys. As a school master at various boarding schools in England and Wales, Nicholson formed "passionate friendships" with some of his students, and dedicated much of his poetry to favoured students.