I'd say no. First of all,
Tully reminds me of
Tilly, which makes it really feminine in my eyes. Secondly, my picture of a boy named
Tully is a little, slightly overweight, shy guy allergic to a thousand things. These are really subjective reasons, I know, but I vote against the name.
Fox is agent Mulder to me, but could be all right.
Quinn is nice.