Surname Ратиа (Ratia 
, Ратиа 
) , in all the world, is quite a rare family name. The surname Ратиа is characteristic of Lesotho, where it is quite a common surname, Finland, where it is quite a rare surname, and Georgia. Not in comparison with a country's population, this name is the most popular in Venezuela, Finland, and Lesotho. Also, Ратиа is the forename as well as the last name.