Tucker has more spunk than most last-name-first-names, and also a positive, comforting ("Tuck me in, Mommy") feel.

Tux can be used as a short form of Tucker, but you're likely more familiar with it as a name for black and white cats. As a pet name, Tux comes from tuxedo — black and white men's formal evening wear. The tuxedo was named after Tuxedo Park, a development for the New York elite and the site of the country club where the tuxedo was first worn.

Sharp and preppy.