Cognomen Duicu (Duicu 
) , in the entire world, is quite a rare last name. The family name Duicu is habitual in Romania, where it is quite a rare surname, Italy, where it is a very rare surname, and Spain. Very seldom, Duicu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Duicu | Romania, Italy, Spain, United States, India |
| iustin duicu Romanian politician from Glăvile, Vâlcea County, RO |
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| oana m duicu researcher (ORCID 0000-0001-6144-2986) |
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| adrian duicu Romanian politician, RO |
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| carmen duicu researcher |
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Mr, Robert, Daniel, Dragos, George, Florin, Mariana, Mihaela, Andreea, Camelia, Ciprian, Daniela, Dumitru, Gabriel, Geanina, Laviniu, Nicolae, Flavius, Catalina, Cristian, Cristina, Gabriela, Raluca, Ramona, Bogdan, Cosmin, Ms, Ana, Ion, Mina, Alex, Alin, Radu, Dany, Ioan, Maria, Valentin, Adela, Petru, Petre, Denis, Lidia, Elena, Ioana, Marian, Simona, Andrei, Adrian, Atena, and Fanel Si Madalina