Globally, Gustus (Gust 
, Gusto , Gustus 
) is quite a rare largely boy's, but seldom feminine first name. The forename Gustus is habitual in Luxembourg, where it is quite a rare boy's name, Belgium, and Mongolia. Not in comparison with a country's population, this name is the most popular in Egypt, Indonesia, and the United States. Likewise, Gustus is the last name as well as the forename.