Cognomen Petronio (Petronio 
, Petrônio , Петроний 
) , globally, is quite a rare family name. The surname Petronio is characteristic of Italy, where it is quite a rare surname, Uruguay, and Slovenia. Not in comparison with a country's population, it most frequently occurs in Italy, Philippines, and the United States. Also, Petronio is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Petronio | Philippines, Brazil, Italy, United States, Argentina |
| Petrônio | Brazil, United States |
| Петронио, Петроний | Russia |
Petronius, Petroniusz, Petrónio, Petrõnio, and Pétronio
| alessandro trajano petronio IT (b. 1510) |
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francesco petronio Italian physician and politician (1840-1895), IT (b. 1840) |
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francesco petronio Italian politician (1931-1994), IT (b. 1931) |
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giuseppe lelio petronio Italian politician, IT (b. 1937) |
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| renato petronio Italian rower, IT (b. 1891) |
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fedora ferluga petronio Italian slavicist, IT (b. 1946) |
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| giuseppe petronio Italian literary critic (1909-2003), IT (b. 1909) |
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| bruno petronio Olympic sailor, IT (b. 1936) |
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| sandra petronio professor of communication studies, IO (b. 1949) |
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| brigitte petronio Italian actress, IT (b. 1950) |
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| ugo petronio (b. 1942) |
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| stephen petronio American choreographer, US (b. 1956) |
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| gianluca petronio Italian basketball coach, IT (b. 1960) |
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| diletta petronio Italian journalist, IT (b. 1960) |
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| maurizio petronio French politician, FR (b. 1961) |
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