Cognomen สุนทรสิงห์ (สุนทรสิงห์ 
, Soontornsingh , Soonthornsingh ) , in the world, is a rare family name. The family name สุนทรสิงห์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, สุนทรสิงห์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สุนทรสิงห์, Soonthornsingh, Soontornsingh | Thailand |