Family name Ustus (Justice 
, Ustus 
, Magusto 
) , around the world, is a common surname. The surname Ustus is characteristic of British Virgin Islands, where it is quite a common surname, Ghana, and the United States, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in the United States, Nigeria, and Ghana. Likewise, Ustus is the forename as well as the last name.