Warmlet
Warren
Warrior
Wart
Warthog
Warui (Japanese for "bad")
Wasabe
Wasabi
Washington
Waterpaw
Watkins
Watney (after "Watney's Red Barrel Beer")
Watson
Watson.
Watti
Wavence
Waverly
Wayne
Wayne And Garth
Wayne Gretsky
Weasel
Weasel Kitty
Weasler
Web
Webb
Webis
Webster
Weckle
Wedgewood
Wedggie