Meaning and name origin
Finnian \f(in)-nian\ as a boy's name is of Irish and Gaelic origin, and the meaning of Finnian is "white, fair". Anglicized form of Gaelic FinnÚn, derived from finn. Also used as pet form of Finn. The 1968 film "Finian's Rainbow" was Fred Astaire's last musical. The name of several early saints, one of whom may have been the same person as Saint Finbar. Saint Finnian of Clonard (sixth century) was called "The Teacher of Irish Saints" because many students at his school became prominent ecclesiastics.
Finnian is not a popular first name for males and an equally uncommon surname or last name for all people (2000 U.S. Census).