Surname คมรัตน์ (คมรัตน์ 
, Komrat 
) , all over the world, is a rare family name. The cognomen คมรัตน์ is characteristic of Turkey, where it is a rare surname, Thailand, where it is a very rare surname, and Germany, where it is an extremely rare surname. Also, คมรัตน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| คมรัตน์ | Thailand |
| Komrat | Turkey, Germany, Thailand, Argentina, Brazil |