Cognomen Mlynarčik (Mlynarčik, Млынарчик 
) , in the world, is a rare family name. The cognomen Mlynarčik is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Млынарчик | Belarus, Russia |