Surname Kumerdej (Kumerdej 
) , around the world, is a very rare family name. The cognomen Kumerdej is habitual in Southern Europe, particularly Slovenia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kumerdej | Slovenia |
| blaž kumerdej teacher (1738-1805), SI (b. 1738) |
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mojca kumerdej writer, philosopher and critic, SI (b. 1964) |
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