Surname Costamagna (Costamagna 
) , across the world, is quite a common last name. The family name Costamagna is characteristic of Monaco, where it is quite a common surname, Argentina, where it is quite a rare surname, and Italy. Not in comparison with a country's population, it is commonest in Italy, Argentina, and France. Very seldom, Costamagna is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Costamagna | Argentina, France, Italy, United States, Switzerland |
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eugenio camillo costamagna Italian journalist, IT (b. 1864) |
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| antonio costamagna ( 1816 — 1839 ) (b. 1816) |
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carlo costamagna Italian lawyer and academic (1881-1965), IT (b. 1881) |
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adriana costamagna Italian actress (1889-1958), IT (b. 1889) |
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| giacomo costamagna Italian priest, IT (b. 1846) |
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giorgio costamagna born:1916-05-24|died:2000-11-24|; Costamagna, Giorgio., IT (b. 1916) |
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giuseppe costamagna Italian politician, IT (b. 1924) |
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claudio costamagna Italian businessman, IT (b. 1956) |
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| domenica costamagna Italian musician, IT (b. 1911) |
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| anna costamagna Italian musician, IT (b. 1911) |
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luisella costamagna Italian journalist and television presenter, IT (b. 1968) |
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alejandra costamagna Chilean journalist and author, CL (b. 1970) |
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| henri costamagna French historian (1926-2017), FR (b. 1926) |
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| carlo costamagna IT (b. 1923) |
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| lidia costamagna Italian linguist (1954-), IT (b. 1954) |
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Mr, Maty, Mili, Sara, Alex, Alei, Aldo, Anna, Abel, Abby, Adri, Ayde, Cara, Kari, Kais, Kyle, Paul, Pini, Pier, Raul, Rosa, Rita, Matt, Mara, Mary, Marc, Ms, Max, Sol, Ana, Ara, Ari, Ada, Pat, Pam, Pao, Ruth, Pia, Luu, Joe, Tom, Nii, Eda, Eva, Ebe, Ivo, Ida, Ugo, Luz, and Rudy