Cognomen Radelj (Radelj 
) , worldwide, is a very rare family name. The last name Radelj is habitual in Southern Europe, particularly Slovenia, where it is quite a rare surname, and Croatia.
| VARIANT | COUNTRY |
|---|---|
| Radelj | Croatia, Slovenia |
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jure radelj Slovene ski jumper, SI (b. 1977) |
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| matija radelj SI |
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| alenka radelj SI |
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