Cognomen Koets (Kocsi 
, Kutsche 
, Koets ) , around the world, is quite a rare family name. The surname Koets is characteristic of Hungary, where it is quite a common surname, Netherlands, where it is quite a rare surname, and Germany. Measured by absolute frequency, it is commonest in Germany, Hungary, and the United States. Much less frequently, Koets is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kocsi | Austria, Hungary, Switzerland, United States, Canada |
| Kutsche | Germany, Switzerland, United States, Canada, Netherlands |
| Koets | Germany, Hungary, Switzerland, United States, Netherlands |
| roelof koets painter from the Northern Netherlands (1592-1654), NL (b. 1592) |
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| andries koets Dutch painter, NL (b. 1621) |
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| roelof koets painter from the Northern Netherlands, born 1655, NL (b. 1655) |
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| hermanus koets Dutch artist, 1663-, NL (b. 1663) |
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| j. pieter koets NL (b. 1685) |
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peter john koets Dutch teacher, editor-in-chief and municipal executive (1901-1995), NL (b. 1901) |
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| dirk koets Dutch painter (1895-1956), NL (b. 1895) |
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arne koets Practitioner of historical martial arts, NL (b. 1980) |
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adam koets American football player (born 1984), US (b. 1984) |
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| willemijntje davids koets |
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| christine koets |
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| maaike koets |
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| johan koets |
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| ad p. koets researcher |
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