Family name คธาทร (คธาทร 
) , around the globe, is an extremely rare surname. The cognomen คธาทร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, คธาทร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| คธาทร | Thailand |
ศรีเพชร, อัศวจิรัฐติกรณ์, and จันทร์แกว