Cognomen Mby (Mby 
) , in all the world, is quite a rare surname. The last name Mby is characteristic of the Democratic Republic of the Congo, where it is quite a rare surname, Egypt, where it is a rare surname, and Myanmar, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in the Democratic Republic of the Congo, Indonesia, and Egypt. Likewise, Mby is the forename as well as the last name.