Family name Клеш (Clech 
, Klech 
, Klesh 
) , in the entire world, is quite a rare cognomen. The family name Клеш is habitual in France, where it is quite a rare surname, Czechia, and Poland, where it is a rare surname. Not in comparison with a country's population, it is commonest in France, the United States, and Czechia. More prevalently, Клеш is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Clech | Germany, France, Democratic Republic of the Congo, Canada, United States |
| Klech | Czechia, France, Democratic Republic of the Congo, United States, Poland |
| Klesh | Democratic Republic of the Congo, Russia, Canada, United States, India |
| Клеш | Russia, Ukraine |