Throughout the world, Koetje (Koetje 
) is an extremely rare boy's first name. Much more frequently, Koetje is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Koetje | Netherlands, Canada, United States, Germany, South Africa |
| helmer koetje Dutch politician (1953-2010), NL (b. 1953) |
|