I love
Finn. I quite like
Finnegan too, and I'm normally not into surnamey names.
I prefer
Finnegan to Finneus,
Phineas (slightly) to
Finnegan, and
Finnegan to Phinnaeus (or Phinneas).
I love the
Phineas spelling. I think the others look a bit silly.
I don't really like either
Finley or
Finlay.
I think I prefer straight-up
Finn. It can totally stand on its own.
I am also partial to
Finbar! I think
Finbar is my favourite full name for
Finn / Fin.