All over the world, Koullias (Koullias 
) is an extremely rare unknown gender first name. Much more prevalently, Koullias is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Koullias | Canada, Australia, Finland, United States, Greece |
Mr, George, Yianni, Manolis, Melissa, Michael, Michail, Stephen, Antonia, Charlie, Cynthia, Despina, Giannis, Giorgos, Nomikos, Emanuel, Ioannis, Samantha, Stefanos, Caroline, Katerina, Kalliope, Costas, Skevos, Steven, Melina, Ico, Mike, Anna, Rose, John, Nick, Niki, Maria, Mikes, Steve, Pantelis, Karla, Kitsa, Paris, Peter, Diane, Donna, Julia, Teuta, Eliza, Manuel, Monika, Karyn, and Dimitris