Family name Лачын (Lachyn 
, Лачын 
) , in the entire world, is a rare last name. The surname Лачын is habitual in Azerbaijan, where it is quite a rare surname, and Kyrgyzstan, where it is a rare surname. More frequently, Лачын is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lachyn | Azerbaijan, Turkmenistan, Russia, Turkey, United States |
| Лачын | Kazakhstan, Russia, Kyrgyzstan |