Surname Valui (Valui 
, Валуй 
) , all around the world, is a rare last name. The cognomen Valui is characteristic of Belarus, where it is quite a rare surname, Azerbaijan, and Ukraine, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Belarus, Russia, and Azerbaijan. Much less frequently, Valui is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Valui | Russia, Georgia, Belarus, India, Brazil |
| Валуй | Azerbaijan, Kazakhstan, Russia, Belarus, Ukraine |