Surname Друй (Drui 
, Druy 
, Druj ) , in all the world, is a rare last name. The family name Друй is characteristic of Luxembourg, where it is quite a rare surname, Estonia, and France, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in France, the United States, and Estonia. Much less frequently, Друй is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Drui | Estonia, Luxembourg, France, United States, India |
| Druy | Germany, France, United States, India, Mexico |
| Druj | India |
| Друй | Russia, Ukraine, Belarus |