Cognomen Athanassio (Athanassio 
) , in the world, is a very rare family name. The surname Athanassio is habitual in Western Asia, particularly Lebanon, where it is a rare surname. Much less frequently, Athanassio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Athanassio | Lebanon, Spain, United States, Greece |
| athanassio comino Greek Australian businessman (b. 1844) |
|