Family name Lokaichuk (Lokaichuk 
, Локаичук 
) , all around the world, is a very rare cognomen. The cognomen Lokaichuk is habitual in Slovenia, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Lokaichuk | Slovenia, Ukraine |
| Локаичук | Russia |