Surname Košler (Košler 
, Кошлер 
) , throughout the world, is a very rare family name. The cognomen Košler is habitual in Eastern Europe, particularly Czechia, where it is a rare surname, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Košler | Czechia |
| Кошлер | Ukraine |
|
zdeněk košler Czech conductor, CZ (b. 1928) |
|
| josef košler (b. 1910) |
|
|
| miroslav košler Czech conductor and music educator, CZ (b. 1931) |
|
|
| jan košler CZ (b. 1965) |
|