Finnian

Finnian is an anglicized Irish name connected with the element fionn, meaning “fair” or “white.” Its history includes Irish saints and teachers, notably Saint Finnian, so it has a religious and scholarly background as well as a familiar Finn opening. The word meaning should not be turned into a prediction of a child's appearance.

Finian is a closely related spelling and appears in the title Finian's Rainbow. The musical and its later film provide a separate cultural association from the saints' names. Finn can be a short form, although it is also a complete name in its own right. Finnian preserves a longer established Irish form without needing to borrow the meanings of Finnley or other Finn names.