Surname Janč (Janč 
, Янч 
) , across the world, is a rare cognomen. The last name Janč is habitual in Belarus, where it is a rare surname, Ukraine, and Croatia. In absolute terms, it most frequently occurs in Eastern Europe, particularly Ukraine, Belarus, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Janč | Croatia |
| Янч | Belarus, Kazakhstan, Russia, Ukraine |
| antonín janč (b. 1875) |
|
|
| rudolf janč (b. 1888) |
|