Meaning A pet name for William, meaning 'desire' and 'helmet', and symbolizing 'will' and 'protection'. Origin of Billy German +-100%Zoom level changed to 1 Popular Middle Names Dan, Joe, Ray, Wade, Wayne, Wyatt, Leon, Marshall, David, Douglas Pronunciation 🔊 Listen Billy BIHLiy Similar Names Archie William William-Andrew William Henry Bill Willy Thomas William Leaham Liam Willem Wilson Year by Year Popularity of Billy