Surname Lác (Lác 
) , in the world, is a very rare family name. The surname Lác is habitual in South-eastern Asia, particularly Vietnam, where it is a very rare surname. Also, Lác is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lác | Vietnam |
| ján lác (b. 1932) |
|