If you like the Finn names and love James Joyce, Finnegan is extremely winning. Will & Grace 's Eric McCormack chose the Finnigan spelling for his son. And of course Finnegan gains you access to the great short form Finn.
James Joyce took the title of Finnegans Wake from an old Irish-American song.
Finnegan represents a whole genre of Irish family names you might consider, such as Harrigan, Brannigan, Corrigan, Donegan, Mulligan, Flanagan and Lanigan.