Cognomen Kool (Kool 
, Кул 
, קול 
) , around the world, is a common family name. The cognomen Kool is characteristic of Estonia, where it is quite a common surname, Netherlands, and Mauritius, where it is quite a rare surname. In absolute terms, it most frequently occurs in Netherlands, India, and Egypt. Very seldom, Kool is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kool | India, Indonesia, Egypt, Sudan, Netherlands |
| Кул | Ukraine, Kazakhstan, Armenia, Russia, Kyrgyzstan |
| קול | Israel |
| Кооль | Ukraine, Russia, Kyrgyzstan, Kazakhstan |
| laurens van kool Houbraken: (1608-1666), V1, p 31 (b. 1510) |
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| willem gillisz kool painter from the Northern Netherlands, NL (b. 1608) |
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| jan kool (b. 1741) |
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arthur kool Dutch politician, NL (b. 1841) |
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| suzanna jacoba kool (1792-1851) (b. 1792) |
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| aart kool NL (b. 1787) |
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| hendrikje abraham kool 1806 - 1869 (b. 1806) |
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| sipke kool Dutch painter (1836-1902), NL (b. 1836) |
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jaap kool Dutch composer and educationist, NL (b. 1890) |
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karl kool (b. 1891) |
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bert de kool Dutch politician, NL (b. 1906) |
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halbo c. kool writer from the Netherlands, NL (b. 1907) |
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| cato kool Dutch painter (1860-1933), NL (b. 1860) |
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molly kool Canadian sailor (1916-2009), CA (b. 1916) |
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| adriaan schuckink kool physician, NL (b. 1873) |
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