Willy is a given name that can refer to:
- Willy Wagstaff, a street vendor who worked in Diagon Alley
- Willy Widdershins, arrested by the Ministry of Magic for enchanting a series of Regurgitating toilets
Willi and Willie are alternate spellings:
- Willi Wenzel, a Quidditch player.
- Barry Wee Willie Winkle, the oldest living wizard.