Across the world, Koleff (Koleff 
) is an extremely rare unknown gender given name. Much more frequently, Koleff is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Koleff | Romania, Mexico, Bulgaria, United States, Argentina |
May, Maria, Mario, Magda, Megan, Mirta, Mirna, Sandy, Sasha, Susan, Odis, Steve, Allen, Angel, Annie, Carla, Cathy, Bella, Boris, Bryan, Katie, Scott, Olga, Nora, Juan, Ana, Kim, Jim, Ted, Mike, Alan, Anne, Raul, Rita, Ruth, Dawn, Dora, Dyko, Gary, Lois, Lynn, Jane, Jose, John, Joan, Jeff, Kolyo, and Kelly