Across the world, Gianfausto (Gianfausto 
) is a rare boy's first name. The first name Gianfausto is characteristic of Southern Europe, particularly Italy, where it is a rare male name.
| VARIANT | COUNTRY |
|---|---|
| Gianfausto | Italy, Brazil, Venezuela |
| gianfausto dell’antonio Italian physicist, IT (b. 1933) |
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| gianfausto rosoli Italian sociologist (1938-1998), IT (b. 1938) |
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| gianfausto salvadori researcher |
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Rota, Guerrini, Gilberti, Vincenzi, Flammini, Iannucci, Maraglino, Ambrosini, Galliani, Bonfadini, Dominicis, Toninelli, Entratici, Zanardini, Casagrande, Notarnicola, Mastromarino, Pescatori, Pezzotta, Pezzotti, Bigaroli, Aceti, Breda, Bruno, Seniga, Canini, Peroni, Zanoni, Martini, Montini, Cortese, Ballini, Bertoli, Lancini, Fabbrucci, Ferrari, Silvetti, Abbatinali, Dell'Antonio, and Pellegrinetti