Surname Афанасиос (Athanasios 
, Athanassios 
, Афанасиос 
) , in the world, is a widespread family name. The surname Афанасиос is characteristic of Greece, where it is a prevalent surname, North Macedonia, where it is quite a rare surname, and Cyprus. Measured by absolute frequency, it is commonest in Greece, Afghanistan, and Romania. Also, Афанасиос is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Athanasios | United Kingdom, Germany, Greece, Cyprus, United States |
| Athanassios | United Kingdom, Germany, Greece, South Africa, United States |
| Афанасиос | Ukraine, Russia |
Afanasij, Afanassi, Afanasy, Apanas, Atanas, Atanasije, Atanazy, Atanáz, Athanase, Athanasis, Athanasius, Nasos, Sakis, Thanasakis, Thanasis, Thanasos, Thanasoulas, Thanos, Thasos, Αθανάσης, Αθανάσιος, Θάνος, Θάσος, Θανάσης, Νάσος, Σάκης, Апанас, Атанас, Атанасиос, Атанасій, Афанас, Афанасий, Афанасиус, Афанасі, Афанасій, Афоня, Опанас, Панас, and Танасий