I like Hawk much better, but it seems a little gimmicky.
Even though it's just as gimmicky, I like Falcon better, it sounds more like a name.
Other names along the animal line:
Astor is a name that means "hawk"
Andor- eagle
Griffin
I don't like Holt, Hagen,or
Holden.
Hammond is ok.
Other 'H' names:
Horus (hawk)
HoratioHarlanHeathHeron