Duffy (nickname)
Duffy is the nickname of:
- Duffy Ayers, English portrait painter born Elizabeth Fitzgerald in 1915
- Duffy Cobbs, American former football player
- Duffy Daugherty, American college football player and Hall of Fame coach
- Duffy Dyer, American former Major League Baseball player
- Duffy Jackson, American jazz drummer
- Duffy Lewis, American Major League Baseball player
- Norma "Duffy" Lyon, American farmer and butter sculptor