Surname Олт (Ault 
, Олт 
) , around the world, is quite a common cognomen. The surname Олт is habitual in U.S. Virgin Islands, where it is quite a common surname, the United States, where it is quite a rare surname, and Guyana. Not in comparison with a country's population, the name is most common in the United States, the United Kingdom, and Canada. Very seldom, Олт is the forename as well as the last name.