Family name Obreja (Obreja 
, Обрежа 
) , in all the world, is quite a rare cognomen. The surname Obreja is characteristic of Romania, where it is quite a common surname, Moldova, and Ireland, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Romania, Moldova, and Ukraine. Much less frequently, Obreja is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Obreja | Romania, Moldova, Germany, Spain, Italy |
| Обрежа | Kazakhstan, Russia, Ukraine |
| alexandru obreja Romanian geographer (b. 1908) |
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| constantin obreja Romanian bobsledder (b. 1955) |
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| marius lucian obreja Romanian politician, RO (b. 1960) |
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| rudel obreja Romanian boxer, RO (b. 1965) |
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| grigore obreja Romanian sprint canoeist, RO (b. 1967) |
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| elena obreja researcher (ORCID 0000-0001-7080-2023) |
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| alexandru cosmin obreja researcher ORCID ID = 0000-0003-1091-3287 |
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| mihaela obreja researcher |
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| otilia obreja researcher ORCID ID = 0000-0002-0230-7538, RO |
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| karina obreja researcher ORCID ID = 0000-0003-3975-0020 |
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Mr, Ilie, Igor, Iana, Ioan, Olga, Oana, Maria, Marie, Magda, Vlad, Mihai, Sandu, Sonia, Sorin, Alina, Andra, Adina, Aurel, Calin, Costi, Sanda, Vera, Ella, Nuta, Ms, Ana, Dan, Edy, Ion, Mara, Mona, Sica, Alex, Alin, Anna, Anca, Paul, Radu, Dani, Dana, Dina, Gelu, Geta, Gigi, Gica, Paula, and Petru