Surname Oproiu (Oproiu 
) , around the world, is quite a rare family name. The surname Oproiu is characteristic of Romania, where it is quite a common surname, Greece, where it is a rare surname, and Belgium. Measured by absolute frequency, it is the most numerous in Romania, Spain, and Germany. Very seldom, Oproiu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Oproiu | Belgium, Spain, Greece, Romania, Germany |
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ecaterina oproiu RO (b. 1929) |
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| alexandru oproiu Romanian gastroenterologist, RO (b. 1930) |
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| tiberiu oproiu Ph.D. Babeş-Bolyai University 1975, RO (b. 1939) |
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| nicolae viorel oproiu RO (b. 1940) |
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| vasile i. oproiu Ph.D. Alexandru Ioan Cuza University of Iasi 1969 |
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| melania oproiu |
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Mr, Diana, Laura, Elena, Ionut, Ioana, Iulia, Marius, Monica, Silviu, Simona, Andrew, Andrei, Adrian, Carmen, Cristi, Crissa, Bogdan, Kosmyn, Ramona, Razvan, Robert, Denis, René, Petre, Andra, Ms, Ana, Dan, Edy, Ion, Alex, Alin, Anca, Dana, Doru, Roxana, Domi, Nicu, Vali, Vlad, Oana, Maria, Mario, Mihai, Sorin, Alice, Alina, Tina, and George