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Worldwide, Giannopoulos (Giannopoulos
, Γιαννόπουλος
) is an extremely rare male forename. Much more prevalently, Giannopoulos is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Giannopoulos | Canada, Greece, Australia, United States, Germany |
| Γιαννόπουλος | Greece |
Γιαννοπουλος, and Гианнопоулос