Family name रत्नाकर (Ratnakar 
, रत्नाकर) , throughout the world, is quite a common cognomen. The last name रत्नाकर is characteristic of United Arab Emirates, where it is a rare surname, Kuwait, and India. Not in comparison with a country's population, the name is most common in India, United Arab Emirates, and the United States. More frequently, रत्नाकर is the forename as well as the last name.