Last name 勒娜 (Ratna 
, 勒娜 
) , in all the world, is a common cognomen. The last name 勒娜 is characteristic of Indonesia, where it is quite a common surname, Brunei, where it is quite a rare surname, and Qatar. In absolute terms, the name is most common in Indonesia, India, and Bangladesh. More frequently, 勒娜 is the forename as well as the last name.