Family name Руст (Rust 
, Roost , Руст 
) , around the globe, is a common last name. The cognomen Руст is characteristic of Switzerland, where it is quite a common surname, Namibia, and Estonia. Not in comparison with a country's population, this name is the most popular in the United States, Germany, and the United Kingdom. Much less frequently, Руст is the forename as well as the last name.