Surname สัมพันธมิตร (สัมพันธมิตร 
, Samphantasit , Sumphantasit ) , all over the world, is a rare last name. The last name สัมพันธมิตร is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, สัมพันธมิตร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Samphantasit, Sumphantasit, สัมพันธมิตร, Sampanthamit | Thailand |
Sampantamitr, Samphanthamit, Samphanthasit, Sumpantamitr, and Sumpuntamitr