Last name Olius (Olius 
) , across the world, is a very rare surname. The surname Olius is habitual in the Dominican Republic, where it is a rare surname, Argentina, where it is a very rare surname, and Spain. Not in comparison with a country's population, this name is the most popular in the United States, the Dominican Republic, and Argentina. Also, Olius is the forename as well as the last name.