Surname Costescu (Costescu 
) , all around the world, is quite a rare cognomen. The family name Costescu is habitual in Romania, where it is quite a common surname, Ireland, where it is a rare surname, and Austria. Measured by absolute frequency, it is the most numerous in Romania, the United States, and Germany. Very seldom, Costescu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Costescu | Germany, Romania, United Kingdom, United States, Canada |
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constantin costescu Romanian general, RO (b. 1861) |
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nicolae costescu Romanian general, RO (b. 1888) |
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| teodor d. costescu politician, RO (b. 1864) |
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dan marian costescu Romanian engineer and manager, RO (b. 1969) |
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| eleonora costescu RO (b. 1916) |
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| grigore costescu Romanian basketball player (1934-2008), RO (b. 1934) |
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| manuel costescu Romanian politician, RO (b. 1976) |
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| daniel costescu Romanian footballer, RO (b. 1976) |
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| dustin costescu researcher |
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| cristina a costescu researcher (ORCID 0000-0001-9329-9918) |
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| adrian costescu RO |
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Mr, Nita, Nora, Nuta, Vali, Valy, Vlad, Ioan, Oana, Zina, Nina, Maria, Mihai, Sonia, Sorin, Sofia, Alina, Andra, Ariel, Adina, Aaron, Matei, Chris, Nicu, John, Ms, Ana, Ron, Dan, Geo, Jay, Ion, Mike, Sica, Nick, Alex, Cody, Paul, Radu, Raul, Rita, Dana, Doru, Gabi, Geta, Abel, and Costi