Family name Kogej (Kogej 
) , worldwide, is a rare surname. The last name Kogej is habitual in Slovenia, where it is quite a common surname, Croatia, where it is quite a rare surname, and Czechia, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Slovenia, Croatia, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Kogej | Germany, Croatia, Slovenia, Canada, Czechia |
| josip kogej SI (b. 1831) |
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| peter kogej SI (b. 1891) |
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| rudi kogej SI (b. 1899) |
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| mila kogej SI (b. 1903) |
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| pavel kogej SI (b. 1927) |
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| ksenija kogej researcher, SI |
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| tina kogej SI |
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| adela kogej SI |
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| miloš kogej SI |
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| žiga kogej SI |
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| peter kogej SI |
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| stojan kogej SI |
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| rok kogej SI (b. 1987) |
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| katarina kogej SI (b. 1993) |
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Mr, Vesna, Vojko, Marija, Marcel, Mateja, Sandra, Andrea, Lorena, Ljerka, Vedran, Marijan, Miljutin, Michael, Andreja, Antonio, Barbara, Klaudio, Ksenija, Paulina, Elisa, Katarina, Nadja, Lejla, Ms, Ken, Blaz, Keja, Tina, Igor, Marko, Matej, Sašo, Antea, Armin, Boris, Blaž, Petra, Denis, Dejan, David, Doris, Goran, Tomaz, and Christophe