Seppi can be either an Italian family name, or an affectionate abbreviation for the name Joseph or Josef, commonly used in Swiss German.
People with the family name Seppi:
- Andreas Seppi - Italian tennis player
- Donato Seppi - Leader of Italian nationalist political party Unitalia
People with the given name, or referred to as Seppi:
- Seppi DuMoulin - Canadian Football League player of the early 20thC
- Seppi Hurschler - Swiss Nordic skiing competitor
- Josef Ritler - Swiss journalist
- Jo Siffert - Swiss motor racing driver of the 1960s and '70s