Cognomen Decleva (Decleva 
) , worldwide, is a rare family name. The last name Decleva is characteristic of Austria, where it is a rare surname, Italy, and Australia, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Italy, Brazil, and Austria.
| VARIANT | COUNTRY |
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| Decleva | Australia, Austria, Argentina, Italy, Brazil |
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decleva zoltán Hungarian general, HU (b. 1887) |
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enrico decleva Italian historian (1941-2020), IT (b. 1941) |
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| mario decleva DECLEVA, Mario (born 1930), Painter, engraver, AT (b. 1930) |
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| fernanda decleva caizzi Italian historian of philosophy, IT (b. 1950) |
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| gregor decleva (born 1959) (b. 1959) |
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| piero decleva chemist at University of Trieste |
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| pietro decleva Italian chemist, IT |
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| benedict decleva (born 1986) (b. 1986) |
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| constantin decleva (born 1989) (b. 1989) |
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Mr, Miklos, Miguel, Murilo, Sabine, Silvia, Sophia, Albert, Andrea, Carmen, Camila, Karina, Rafael, Rosana, Romulo, Danilo, Janete, Juceli, Eliane, Edward, Enrico, Emilia, Marcos, Martin, Marina, Vilma, Ana, Eva, Mark, Aldo, Abel, Paul, Raul, Luiz, Jane, Jose, Emilio, Juan, Bruno, Karen, Klaus, Peter, Pedro, Denes, Diane, Diego, Lucas, Elise, Maria, and Hosana