Cognomen กมลรัตนกุล (กมลรัตนกุล 
, Komonrattanakul , Kamolrattanakul ) , all over the world, is a rare family name. The surname กมลรัตนกุล is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kamolrattanakul, Kamolratanakul, กมลรัตนกุล, Komonrattanakul | Thailand |
| ภิรมย์ กมลรัตนกุล Thai politician, TH (b. 1949) |
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