Family name Kotsis (Kotsis 
) , in the world, is quite a rare cognomen. The cognomen Kotsis is habitual in Greece, where it is quite a common surname, Hungary, where it is quite a rare surname, and Luxembourg. Measured by absolute frequency, the name is most common in Greece, Hungary, and the United States. Very seldom, Kotsis is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kotsis | Germany, Greece, United States, Hungary, Romania |
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aleksander kotsis Polish artist (1836-1877), PL (b. 1836) |
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kotsis iván Hungarian architect (1889-1980), HU (b. 1889) |
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| kotsis endre Hungarian architect, HU (b. 1897) |
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gabriele kotsis Austrian university teacher, AT (b. 1967) |
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| gabriella kotsis Hungarian indoor volleyball coach (b. 1928) |
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| athnasios kotsis Greek rower, GR (b. 1971) |
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| vasilios kotsis researcher |
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| thomas kotsis researcher (ORCID 0000-0003-4428-989X) |
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| kotsis edina Hungarian taekwondo athlete, HU (b. 1990) |
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Mr, John, Joan, Jill, Nick, Faye, Zois, Maria, Manda, Manos, Manny, Minas, Sofia, Steve, Stasi, Alkis, Andre, Anthi, Aracy, Chris, Josh, Jack, Lynn, Greg, Ms, Ann, Bob, Dim, Gus, Jim, Tom, Eve, Mark, Carol, Mike, Anna, Aris, Bill, Kurt, Kimi, Pete, Reka, Rita, Dina, Alex, and Cathy