Surname Deotto (Deotto 
) , throughout the world, is a rare last name. The surname Deotto is habitual in Italy, where it is a rare surname, France, and Croatia. In absolute terms, it most frequently occurs in Italy, France, and Argentina. Also, Deotto is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Deotto | France, Argentina, Italy, Brazil, Japan |
| romolo deotto Italian physician, IT (b. 1911) |
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| mario deotto Italian association football player (1935-2020), IT (b. 1935) |
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| angela deotto researcher |
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| lina mascagni deotto |
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