Last name रत्न (Ratna 
, Ratnangi 
, Ratnapura 
) , all over the world, is a common surname. The family name रत्न is characteristic of Indonesia, where it is quite a common surname, Brunei, where it is quite a rare surname, and Qatar. Not in comparison with a country's population, the name is most common in Indonesia, India, and Bangladesh. More prevalently, रत्न is the forename as well as the last name.