Cognomen Valentini (Valentini 
, Валентини 
, ולנטיני 
) , globally, is a common surname. The cognomen Valentini is characteristic of San Marino, where it is a widespread surname, Monaco, where it is quite a common surname, and Italy. In absolute terms, it is the most numerous in Italy, Argentina, and Brazil. Very seldom, Valentini is the forename as well as the last name.
| pier francesco valentini Italian composer, IT (b. 1570) |
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| giovanni valentini Italian composer, IT (b. 1582) |
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michael bernhard valentini German naturalist, DE (b. 1657) |
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| johann valentini (b. 1601) |
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| giovanni carlo valentini Roman Catholic bishop (b. 1617) |
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| pietro valentini Italian catholic bishop (1619-1687), IT (b. 1619) |
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giuseppe valentini Italian violinist, painter, poet and composer, FR (b. 1681) |
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| gian domenico valentini Italian painter (1639-1715), IT (b. 1639) |
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| johann matthäus valentini DE (b. 1644) |
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| michel bernard valentini (b. 1657) |
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| domenico valentini (b. 1690) |
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| christoph bernhard valentini (b. 1694) |
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| konrad michael valentini (b. 1697) |
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| michelangelo valentini Italian composer, IT (b. 1720) |
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| giovanni valentini Italian composer (1750-1804), IT (b. 1750) |
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