Cognomen Дайн (Dain 
, Dayn 
, Дайн 
) , in the entire world, is quite a common family name. The last name Дайн is characteristic of South Korea, where it is quite a rare surname, Malaysia, and Myanmar. Not in comparison with a country's population, this name is the most popular in Pakistan, South Korea, and India. Likewise, Дайн is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dain | Myanmar, South Korea, India, United States, Pakistan |
| Dayn | Philippines, Australia, India, United States, Morocco |
| Дайн | Russia, Kazakhstan, Ukraine |
| Dajn | United States, India |