Across the world, Gian Mario (Gian Mario 
) is a rare principally boy's, but scarcely female first name. The first name Gian Mario is habitual in Italy, where it is a rare predominantly masculine, but very seldom feminine name, Chile, where it is a very rare masculine name, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Gian Mario | Spain, Italy, Germany, Chile, Switzerland |
| gian mario cazzaniga Italian ethicist and politician (1942-), IT (b. 1942) |
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| gian mario anselmi Italian philologist (1947-), IT (b. 1947) |
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