Family name Tarquinio (Tarquinio 
, Tarquinius 
, Tarquínio 
) , globally, is quite a rare cognomen. The last name Tarquinio is habitual in Italy, where it is quite a rare surname, Australia, where it is a rare surname, and the United States. Measured by absolute frequency, it most frequently occurs in Italy, the United States, and Brazil. Likewise, Tarquinio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tarquinio | Australia, Brazil, France, Italy, United States |
| Tarquinius | United States, Romania |
| Tarquínio | Brazil, Portugal |
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tarquinio merula Italian composer and organist, IT (b. 1595) |
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| tarquinio ligustri Italian artist, born 1564 (b. 1564) |
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| tarquinio jacometti Italian sculptor, IT (b. 1570) |
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| tarquinio galluzzi Galluzzi, Tarquinio, 1574-1649, IT (b. 1573) |
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| tarquinio gentili di rovellone Italian numismatist, IT (b. 1822) |
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tarquinio sini Sardinian illustrator and advertiser, IT (b. 1891) |
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| tarquinio fuortes Italian mathematician (1848-1927), IT (b. 1848) |
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| tarquinio armani Italian pedagogue (1878-1940), IT (b. 1878) |
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tarquinio provini Italian motorcycle racer, IT (b. 1933) |
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lucio tarquinio Italian politician, IT (b. 1949) |
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| tarquinio pozzoli IT (b. 1896) |
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| sergio tarquinio Italian painter, IT (b. 1925) |
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| tarquinio ladu Italian physician (1926-2011), IT (b. 1926) |
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| tarquinio angiolin Italian rower, IT (b. 1928) |
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| tarquinio maiorino (b. 1927) |
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