I prefer
Vaughan because one of my hobbies is seeing how many letters I can squeeze into a single syllable. I think
Vaughn would have a slightly easier time getting people to spell it though.
I think it's a decent name in principle, and it gives me a nice image of a modest and moral but not all-American-WASP guy who loves brown argyle. The problem I have with it (besides not really loving the sound) is that with almost any middle name or surname, it sounds like "von _____". Even in
Vaughan Vincent. Though I just realised that it probably popped into your head subconsciously because of
Vince Vaughn. Ew.
Now that I think about it,
Ludwig Vaughan would make an AWESOME combo and anyone who doesn't like it can go off into the dumb people corner.