Family name ธนาศิรสิทธิ์ (ธนาศิรสิทธิ์ 
) , all over the world, is an extremely rare last name. The cognomen ธนาศิรสิทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธนาศิรสิทธิ์ | Thailand |