Surname Petrilla (Petrilla 
) , worldwide, is a rare cognomen. The cognomen Petrilla is characteristic of Slovakia, where it is quite a rare surname, Hungary, where it is a rare surname, and the United States. Much less frequently, Petrilla is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Petrilla | Italy, Slovakia, Hungary, United States, Romania |
| maryanne petrilla American politician, US |
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| allison a petrilla researcher |
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| petrilla jayaprakash researcher |
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| jesse petrilla American politician, US (b. 1983) |
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| joe petrilla |
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