Family name Lelk (เล็ก 
, Lelk 
) , in the entire world, is a very rare surname. The cognomen Lelk is habitual in Thailand, where it is a very rare surname, Germany, where it is an extremely rare surname, and Argentina. Much more frequently, Lelk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เล็ก | Thailand |
| Lelk | Argentina, United States, Germany |
| hans lelk (b. 1910) |
|