Last name เตชาชาญ (เตชาชาญ 
) , around the world, is a very rare cognomen. The cognomen เตชาชาญ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| เตชาชาญ | Thailand |
| ศักดิ์ เตชาชาญ TH (b. 1941) |
|