Last name Proestou (Proestou 
) , around the world, is a rare cognomen. The family name Proestou is characteristic of Cyprus, where it is quite a rare surname, Greece, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Greece, Cyprus, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Proestou | Canada, United States, Greece, Cyprus |