Cognomen Lačný (Lačný 
) , in all the world, is a rare last name. The last name Lačný is habitual in Eastern Europe, particularly Slovakia, where it is quite a rare surname, and Czechia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Lačný | Czechia, Slovakia |
| juraj lačný SK (b. 1748) |
|
|
| ondrej lačný SK (b. 1749) |
|
|
| ľudovít lačný Slovak chess player (1926-2019), SK (b. 1926) |
|
|
| miloš lačný Slovak soccer player and Czech Supercup winner, SK (b. 1988) |
|