Last name Kumelj (Kumelj 
) , in all the world, is a rare cognomen. The family name Kumelj is characteristic of Slovenia, where it is quite a common surname, Slovakia, where it is a rare surname, and Germany, where it is a very rare surname. Much less frequently, Kumelj is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kumelj | Slovenia, Germany, Slovakia, Canada |
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metod kumelj Slovenian editor (b. 1900) |
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| ana pia kumelj badminton player, SI (b. 1983) |
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| špela kumelj SI (b. 1976) |
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| luka kumelj badminton player, SI (b. 1986) |
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| tjaša kumelj SI |
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| marko kumelj SI |
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| majda čuček-kumelj SI |
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| tomaž kumelj SI |
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| matjaž kumelj SI (b. 1987) |
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