I like your list of puppy names. When I think of guard dogs and guard dog names, I often think of Killer or Fang or of something similar. Maybe even Winchester, after the gun maker.
Actually, two of my favorite guard dog names are from the old Magnum P.I. TV show (the one set in Hawaii with Tom Selleck). If you don't remember, they were Doberman Pinschers name Zeus and Apollo.
My favorites from your list are Tracker, Trust, Trapper and Rush. Those are great hunting dog names, too.
