Cognomen Kojder (Kojder 
) , in the world, is a rare last name. The family name Kojder is habitual in Poland, where it is quite a rare surname, Bahrain, and Denmark, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Poland, the United States, and France. More prevalently, Kojder is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kojder | France, Bahrain, Poland, United Kingdom, United States |
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władysław kojder Polish politician, PL (b. 1902) |
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| józef kojder Polish officer, UA (b. 1892) |
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tadeusz kojder PL (b. 1933) |
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| andrzej kojder Polish sociologist, PL (b. 1941) |
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| konrad kojder Polish chess player, PL (b. 1956) |
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