Boy name origins & meanings Teutonic : Valiant protector Boy name variations William Wil Will Willem Wilmos Wilmot Wilson Williams Williamson Wills Willie Willy Wiley Wyley Wilkie Willkie Wilkes Wylkes Willis Wilton Wilmer Wilmar Winton Willard Wilford Guillaume Guillermo Vilhelm Vilem Viliam Vasili Vasily Uilleam Uilliam Family name origins & meanings German : from the Germanic personal name Willahalm, composed of the elements wil ‘will’, ‘desire’ + helm ‘helmet’, ‘protection’.