Worldwide, Gian-Carlo (Gian-Carlo 
) is a rare male first name. The first name Gian-Carlo is habitual in Germany, where it is a very rare boy's name, France, and Philippines. Very seldom, Gian-Carlo is the last name as well as the forename. Parts of the name also exists independently as a first name Gian, and a first name Carlo.
| VARIANT | COUNTRY |
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| Gian-Carlo | Germany, Italy, Philippines, United States, France |
| gian-carlo pallavicini (born 1967) (b. 1967) |
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| gian-carlo t parel researcher |
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| gian-carlo mangano Ph.D. Columbia University 1974 |
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| gian-carlo pascutto Belgian computer programmer, BE (b. 1982) |
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| gian-carlo chiaramello |
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Mora, Delgado, Defazio, Laguzza, Tibolla, Heiling, Ferroni, Fiorino, Zegarra, Marongiu, Mazzotta, Migliastro, Sabatino, Cuaresma, Rolander, Gaccioli, Grimaldi, Giannini, Iannella, Collenberg, Peressutti, Cianfarani, Brandes, Cabaral, Amianti, Angeles, Arce, Bava, Bini, Arena, Carra, Rocha, Reyes, Ricci, Ochoa, Witta, Baldassarra, Yanke, Moreno, Arsciwals, Atayan, Polman, Grossi, Loving, Vidamo, Wagner, Sincioco, Soliman, Maduro, and Pallavicini