Last name Protti (Protti 
) , across the world, is quite a rare cognomen. The last name Protti is characteristic of San Marino, where it is quite a common surname, Italy, where it is quite a rare surname, and Costa Rica. Measured by absolute frequency, it most frequently occurs in Italy, Argentina, and Brazil. Very seldom, Protti is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Protti | Ivory Coast, Brazil, Italy, Argentina, Costa Rica |
| giambattista osvaldo protti Italian politician, IT (b. 1879) |
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| alfredo protti Italian painter (1882-1949), IT (b. 1882) |
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| carlo protti Italian politician (1914-1986), IT (b. 1914) |
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igor protti Italian footballer, IT (b. 1967) |
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marco protti Italian association football player, SM (b. 1969) |
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| aldo protti Italian opera singer (1920-1995), IT (b. 1920) |
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| giampietro protti (born 1925) (b. 1925) |
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| osvaldo cross protti association football player (1925-1992), UY (b. 1925) |
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| daniele protti Italian journalist, IT (b. 1945) |
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| anita protti Swiss hurdler, CH (b. 1964) |
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| giovanni battista protti (born 1971) (b. 1971) |
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| maria adele protti (born 1972) (b. 1972) |
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| benedetta protti (born 1974) (b. 1974) |
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| alberto protti (born 1976) (b. 1976) |
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| fábio protti Ph.D. Universidade Federal do Rio de Janeiro 1998 |
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