Cognomen Rūs (Ruro 
, Rūs) , in the world, is a rare surname. The surname Rūs is characteristic of Equatorial Guinea, where it is quite a rare surname, Indonesia, where it is a very rare surname, and Spain. Not in comparison with a country's population, it is the most numerous in Equatorial Guinea, Indonesia, and Brazil. Also, Rūs is the forename as well as the last name.