Cognomen ვასილი (Vasiliy 
, Vasilij 
, Vassili 
) , throughout the world, is a rare surname. The last name ვასილი is habitual in Reunion, where it is quite a common surname, Moldova, where it is quite a rare surname, and Slovenia, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Reunion, Moldova, and Russia. Much more frequently, ვასილი is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vasiliy | Uzbekistan, Russia, Belarus, Moldova, United States |
| Vasilij | Germany, Russia, Belarus, United States, France |
| Vassili | Germany, Russia, Belarus, United States, Democratic Republic of the Congo |
| ვასილი | Georgia |
Basil, Basile, Basileios, Basili, Basilide, Basilio, Basilius, Basílio, Bazil, Bazilij, Bazilo, Bazyli, Pasi, Vasil, Vasil', Vasile, Vasileios, Vasili, Vasilii, Vasilije, Vasilios, Vasilis, Vasily, Vassil, Vassileios, Vassilios, Vassilis, Vassyl, Vasyl, Vaszil, Vaszilij, Vazul, Wasil, Wasilij, Wassil, Wassili, Wassily, Wassyl, Wasyl, Βασίλειος, Βασίλης, Базил, Базиле, Базили, Базилий, Базилио, Базило, Базилій, Басиль, Безіл, Бэзил, Вазул, Васил, Василе, Василевс, Василие, Василий, Василиос, Василис, Василије, Василь, Василій, Вассил, Вассили, Вассілі, Васыль, Васька, Вася, Васіль, Васілій, Паси, Վասիլի, וסילי, باسيل, فاسيل, فاسيلي, واصل, ვასილ, バジル, and 瓦西里