- Williams (continued)
- Williamson
- Willis
- Willms
- Wills
- Wilmarth
- Wilmot
- Wilske
- Wilson
- Wilston
- Wimmer
- Winch
- Windhorst
- Winegar
- Winegarden
- Winer
- Wing
- Winget
- Wingfield
- Winn
- Winne
- Winship
- Winslow
- Winter
- Winterberg
- Wintermute
- Winton
- Wirt
- Wiscombe
- Wisdom
- Wise
- Wiser
- Witcher
- Witham
- Witherell
- Withers
- Withey
- Withington
- Wittey
- Wittmann
- Wixon
- Wllard
- Woerner
- Wohlers
- Wolan
- Wolcott
- Wolf
- Wolfe
- Wolff
- Wolfley
- Wolford
- Wood