Gianantonio
Gianantonio is an Italian masculine blended given name that is a combination of Gianni and Antonio. Notable people known by this name include the following:
- Gianantonio Capizucchi, Italian Roman Catholic cardinal and bishop
- Gianantonio Da Re, Italian politician
- Gianantonio Davia, Italian Roman Catholic cardinal
- Gianantonio Guardi, nickname of Giovanni Antonio Guardi, Italian painter and nobleman
- Gianantonio Serbelloni, nickname of Giovanni Antonio Serbelloni, Italian Cardinal
- Gianantonio Zopegni, Italian ice hockey player