Cognomen Petkoglou (Petkoglou 
) , across the world, is a rare family name. The cognomen Petkoglou is characteristic of Greece, where it is quite a rare surname, Canada, where it is a very rare surname, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Petkoglou | Greece, United States, Germany, Canada |