Worldwide, Giacomina (Giacomina 
) is quite a common female forename. The first name Giacomina is habitual in Italy, where it is quite a common female name, Brazil, where it is a very rare feminine name, and Argentina. Not in comparison with a country's population, it is the most numerous in Italy, Brazil, and the United States. Very seldom, Giacomina is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Giacomina | Germany, Argentina, Italy, Brazil, United States |
| giacomina rovelli-rederer AT (b. 1800) |
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giacomina lapenna Italian journalist, IT (b. 1924) |
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| giacomina castagnetti (b. 1925) |
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| giacomina bartalucci Righteous Among the Nations, IT |
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| giacomina chiaradia researcher |
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| giacomina brunetti researcher |
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| giacomina loriga researcher |
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| giacomina rossi researcher |
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| giacomina farnese |
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| giacomina della gherardesca IT |
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Mora, Zinghi, Carbone, Cavalli, Belloni, Lagrasta, Lazzari, Viviani, Ferrari, Marchese, Mazzanti, Moniello, Molinari, Multineddu, Semeraro, Cattaneo, Palmieri, Pascuzzo, Rossetti, Olivieri, Carminati, Ghiglione, Grassi, La Serpe Geroni, Galati, Biondi, Mura, Sole, Canu, Rosa, Melis, Sanna, Serra, Amato, Carta, Costa, Cozzi, Croce, Pesce, Rossi, Ricci, Russo, Teodi, Ferri, Milone, Santos, Sergio, Piazza, and Locatelli