Cognomen Koekkoek (Koekkoek 
) , all around the world, is quite a rare surname. The cognomen Koekkoek is characteristic of Netherlands, where it is quite a rare surname, Latvia, where it is a rare surname, and Belgium. Not in comparison with a country's population, it is commonest in Netherlands, the United States, and Germany.
| VARIANT | COUNTRY |
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| Koekkoek | Germany, United States, Poland, Canada, Netherlands |
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johannes hermanus koekkoek Dutch marine painter (1778-1851), NL (b. 1778) |
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barend cornelis koekkoek painter from the Northern Netherlands (1803-1862), NL (b. 1803) |
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marinus adrianus koekkoek painter from the Northern Netherlands and brother of Barend Cornelis Koekkoek (1807-1868), NL (b. 1807) |
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hermanus koekkoek painter from the Northern Netherlands, NL (b. 1815) |
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hermanus koekkoek der jüngere Dutch landscape painter and son of Hermanus Koekkoek the Elder, NL (b. 1836) |
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willem koekkoek painter from the Northern Netherlands (1839–1885), NL (b. 1839) |
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johannes hermanus barend koekkoek painter from the Northern Netherlands (1840-1912), NL (b. 1840) |
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| johannes koekkoek painter from the Northern Netherlands (1811-1831), NL (b. 1811) |
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hermanus willem koekkoek painter from the Northern Netherlands, NL (b. 1867) |
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gerard koekkoek Dutch painter, NL (b. 1871) |
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stephen robert koekkoek painter from the Northern Netherlands (born in London) (1887-1934), GB (b. 1887) |
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| adèle koekkoek painter from Germany, DE (b. 1838) |
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| maria louise koekkoek Dutch painter, NL (b. 1840) |
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| hendrik pieter koekkoek Dutch landscape painter, son of M.A. Koekkoek (I), NL (b. 1843) |
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| marianus adrianus koekkoek (b. 1833) |
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