Family name กาญจนวัฒน์ (กาญจนวัฒน์ 
, Kanjanawat , Kanchanawat 
) , worldwide, is a rare cognomen. The family name กาญจนวัฒน์ is habitual in Thailand, where it is a rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Also, กาญจนวัฒน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karnjanawat, กาญจนวัฒน์, Kanjanawat | Thailand |
| Kanchanawat | United States, United Kingdom, Thailand |
Ganawat, Ganjanawat, Kajanawat, Kanchanavat, Kanchanawatch, Kanjanaswat, Kanjanavat, Kanjanavathang, Kanjanawatta, Kankarnjanawat, and Karnchanawat
| ประสิทธิ์ กาญจนวัฒน์ 1915-, TH (b. 1915) |
|