Last name กรรณวัฒน์ (Kannawat 
, กรรณวัฒน์ , Karnawat 
) , globally, is quite a rare family name. The cognomen กรรณวัฒน์ is habitual in Thailand, where it is a rare surname, India, and Finland. Not in comparison with a country's population, it is commonest in India, Thailand, and the United States. Much less frequently, กรรณวัฒน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| กรรณวัฒน์, Kannawat | Thailand |
| Karnawat | United Kingdom, Australia, United States, India, Finland |
| นายช่วย กรรณวัฒน์ ambassador of Thailand to Indonesia 1979 – 1982, TH |
|