Cognomen Petrella (Petrella 
) , worldwide, is quite a common surname. The family name Petrella is characteristic of Italy, where it is quite a rare surname, Luxembourg, and Uruguay. In absolute terms, it is the most numerous in Italy, the United States, and Argentina. Very seldom, Petrella is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Petrella | Italy, Brazil, Canada, United States, Argentina |
| enrico petrella (b. 1513) |
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| bernardino petrella (b. 1529) |
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| guglielmo ugo petrella Italian politician (1837-1920), IT (b. 1837) |
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clara petrella Italian opera singer, IT (b. 1914) |
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generoso petrella Italian politician (1929-1997), IT (b. 1929) |
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| vittorio petrella Italian illustrator, IT (b. 1886) |
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fernando petrella Argentine lawyer, AR (b. 1938) |
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riccardo petrella Italian sociologist and human rights activist, IT (b. 1941) |
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vito petrella Italian sprinter, IT (b. 1965) |
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ivan petrella American theologian, AR (b. 1969) |
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ian petrella American actor, US (b. 1974) |
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gianluca petrella Italian jazz trombonist, IT (b. 1975) |
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| domenico petrella Italian politician, IT (b. 1927) |
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| liana maria scuracchio petrella person identified in the Museu da Pessoa collection (b. 1943) |
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| pasquale petrella Italian building engineer (1944-), IT (b. 1944) |
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