Surname Janc (Janc 
, Янц 
, جانك) , all over the world, is quite a rare cognomen. The cognomen Janc is habitual in Slovenia, where it is quite a common surname, Lithuania, where it is quite a rare surname, and Poland. Not in comparison with a country's population, the name is most common in Poland, Slovenia, and Russia. Likewise, Janc is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Janc | Poland, Lithuania, United States, Slovenia, Germany |
| Янц | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| andreas janc Austrian cross-country skier, AT (b. 1938) |
|
|
|
blaž janc Slovenian handball player, SI (b. 1996) |
|
| franci janc SI (b. 1937) |
|
|
| marija janc SI (b. 1938) |
|
|
| katarzyna janc Polish rower, PL (b. 1950) |
|
|
| alfred janc Polish economist (b. 1951) |
|
|
| marija janc Slovene economist, SI (b. 1956) |
|
|
| branko janc Slovene economist and politician, SI (b. 1956) |
|
|
| kristijan janc politician, SI (b. 1960) |
|
|
| adolf janc SI (b. 1952) |
|
|
| mirko janc Ph.D. University of Belgrade 1981 |
|
|
| - janc Slovene association football player, SI |
|
|
| helena janc Polish Righteous Among the Nations, PL |
|
|
| tadeja janc researcher (ORCID 0000-0002-9786-7772) |
|
|
| andreja janc SI (b. 1974) |
|