Cognomen Улуг (Ulug 
, Улуг 
, Ulugh 
) , in all the world, is quite a common family name. The cognomen Улуг is habitual in Turkey, where it is quite a common surname, Kyrgyzstan, where it is quite a rare surname, and Sweden, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Turkey, Kyrgyzstan, and Nigeria. Much less frequently, Улуг is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ulug | Sweden, Uzbekistan, Germany, Turkey, United States |
| Улуг | Ukraine, Russia, Kyrgyzstan, Kazakhstan, United States |
| Ulugh | Nigeria |
| Uluğ | Turkey, United States |