Family name Rūkas (Rūkas 
) , across the world, is a very rare cognomen. The family name Rūkas is habitual in Northern Europe, particularly Lithuania, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Rūkas | Lithuania |
| antanas rūkas Lithuanian actor, LT (b. 1907) |
|
Karolis, Martynas, and Augustinas