Family name Koluba (Koluba 
) , throughout the world, is a very rare cognomen. The surname Koluba is habitual in Tanzania, where it is a very rare surname, Ukraine, where it is an extremely rare surname, and Philippines. Very seldom, Koluba is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koluba | Tanzania, India, Ukraine, Philippines |