Last name Kaosar (Kaosar 
) , all over the world, is quite a rare cognomen. The cognomen Kaosar is habitual in Oman, where it is quite a rare surname, Bangladesh, and United Arab Emirates, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Southern Asia, particularly Bangladesh, Pakistan, and India. More frequently, Kaosar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kaosar | Bangladesh, Pakistan, India, Syria, Saudi Arabia |