Last name Koumans (Koumans 
) , in the world, is a rare surname. The family name Koumans is characteristic of Western Europe, particularly Netherlands, where it is quite a rare surname, Belgium, where it is a rare surname, and Germany, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Netherlands, Belgium, and the United States.
| frederik petrus koumans Dutch ichthyologist (1905–1977), DE (b. 1905) |
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| wim koumans NL (b. 1901) |
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| frederik petrus koumans (b. 1905) |
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| rudolf koumans Dutch composer and musicologist, NL (b. 1929) |
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| jack koumans association football player, NL (b. 1966) |
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| emilia h koumans researcher |
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| wim koumans |
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| madeline marie caroline koumans |
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