Last name Ciolacu (Ciolacu 
) , around the globe, is quite a rare surname. The last name Ciolacu is habitual in Romania, where it is quite a rare surname, Moldova, and Ireland, where it is a rare surname. In absolute terms, it is commonest in Romania, Moldova, and Italy. Much less frequently, Ciolacu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ciolacu | Moldova, Romania, United States, Germany, Italy |
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ion-marcel ciolacu Romanian politician (1967-), RO (b. 1967) |
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mihaela ciolacu Romanian association football player, RO (b. 1998) |
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| olga ciolacu Moldovan singer, MD (b. 1949) |
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| mihai ciolacu rugby union player (1977-), RO (b. 1977) |
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| diana ciolacu researcher, RO |
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| luminița ciolacu researcher ORCID ID = 0000-0003-4123-7859, RO |
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| florin ciolacu researcher |
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| constantin ciolacu Romanian politician from Gherghița, Prahova County, RO |
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| ioana ciolacu Romanian fashion designer, RO (b. 1982) |
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| andrei ciolacu Romanian footballer, RO (b. 1992) |
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| alessia-mihaela ciolacu chess player |
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Mr, Paula, Petra, Petru, Delia, Diana, Doina, Laura, Luiza, Elena, Fanel, Ionut, Ioana, Marian, Marius, Monica, Mirela, Mihail, Mioara, Silviu, Simona, Sergiu, Adela, Alina, Steve, Seila, Ms, Ana, Adi, Ady, Dan, Ina, Ion, Alex, Alin, Alyn, Sorana, Anca, Dima, Joan, Nelu, Vlad, Ivan, Iuri, Olga, Oana, Maria, Mihai, Radu, and Stefan