Gian Antonio
Gian Antonio is a masculine blended given name that is a combination of Gianni and Antonio. Notable people known by this name include the following:
- Gian Antonio Fassano, Italian Roman Catholic prelate
- Gian Antonio Grassi, Italian Roman Catholic prelate
- Gian Antonio Selva, Italian neoclassical architect
- Gian Antonio Serbelloni, nickname of Giovanni Antonio Serbelloni, Italian Cardinal