Jonathan Leonard Cain (born John Friga on February 26, 1950 in Chicago, Illinois) is an American musician, most known for his keyboards and songwriting roles in the rock band Journey.
At the age of eight he began accordion lessons, and by the time he was in his teens he was playing accordion and piano at parties and in clubs. He also plays guitar and the harmonica. He was a survivor of the Our Lady of the Angels school fire in 1958, of which he escaped unharmed, but saw many of his classmates die. He later graduated from the Juilliard School of Music.