Cognomen Mateiu (Mateiu 
) , throughout the world, is quite a rare surname. The surname Mateiu is habitual in Romania, where it is quite a common surname, Zimbabwe, where it is a rare surname, and Spain, where it is a very rare surname. In absolute terms, the name is most common in Romania, Zimbabwe, and Italy. Much less frequently, Mateiu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mateiu | Italy, Zimbabwe, Spain, United States, Romania |
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alexandru mateiu Romanian footballer, RO (b. 1989) |
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| ligia m. mateiu researcher, RO |
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| ligia mateiu Ph.D. University of Alberta 2007 |
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| andreea mateiu Romanian actress, RO |
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| dumitru mateiu Romanian politician from Fântânele, Prahova County, RO |
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| costel mateiu Romanian politician from Gura Văii, Vrancea County, RO |
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| ramona valentina mateiu researcher |
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| andrei mateiu Romanian actor, RO |
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Mr, Calin, Kevin, Petru, David, Diana, Dorin, Laura, Linda, Lidia, Ligia, Lucia, Llili, Todor, Tudor, Eliza, Elena, Eniko, Hilda, Irina, Ionel, Ionut, Adina, Andra, Alina, Matei, Ms, Ana, Dan, Edy, Ion, Alex, Alin, Anda, Andy, Anca, Ioana, Paul, Ruxi, Dana, Gaby, Nelu, Emil, Vlad, Ilie, Ioan, Oana, Maria, Raul, and Iosif