Family name Koetje (Koetje 
) , throughout the world, is quite a rare cognomen. The family name Koetje is characteristic of Netherlands, where it is quite a rare surname, South Africa, where it is a rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Koetje | Germany, South Africa, United States, Canada, Netherlands |
| james l. koetje American politician, US (b. 1955) |
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| jaap koetje NL (b. 1948) |
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| klaas koetje NL (b. 1958) |
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| jan h koetje researcher |
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