Surname Vaini (Vaini 
) , globally, is a rare cognomen. The last name Vaini is habitual in Italy, where it is a rare surname, Greece, and Australia. Measured by absolute frequency, it is the most numerous in Italy, Brazil, and India. More frequently, Vaini is the forename as well as the last name.
| carlo vaini Roman Catholic archbishop (b. 1620) |
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| giovanni minghelli vaini Italian politician (1817-1891), IT (b. 1817) |
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| pietro vaini (b. 1847) |
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| ennio vaini Italian association football player, IT (b. 1911) |
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| mario vaini IT (b. 1926) |
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| paolo vaini Italian association football player, IT (b. 1938) |
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| luiz carlos vaini person identified in the Museu da Pessoa collection, BR (b. 1944) |
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| emanuele vaini researcher |
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| jussara oliveira vaini researcher (ORCID 0000-0001-8029-697X) |
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