Cognomen Mercaldi (Mercaldi 
) , all around the world, is a rare family name. The cognomen Mercaldi is characteristic of Italy, where it is a rare surname, Brazil, where it is a very rare surname, and the United States. Much less frequently, Mercaldi is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mercaldi | Canada, Brazil, Italy, Germany, United States |
| francesco saverio mercaldi Italian poet and writer, IT (b. 1844) |
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| luiz raphael cyrino mercaldi person identified in the Museu da Pessoa collection, BR (b. 1942) |
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| gustavo f. mercaldi researcher ORCID ID = 0000-0003-1445-6060 |
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Mr, Gina, Lara, Lori, Luiz, Luan, Jane, Jose, John, Joao, Jody, Jean, Tana, Tony, Toni, Nora, Elio, Elsa, Enzo, Enza, Ivan, Maria, Dina, Marie, Dana, Rene, Ms, Ana, Ron, Rik, Ruy, Lya, Joe, Joy, Ian, Mara, Mike, Sara, Alex, Alan, Anna, Caio, Ciro, Beth, Bill, Paul, Rosa, Rick, and Mario