Family name สุนทรหฤทัย (สุนทรหฤทัย 
) , throughout the world, is an extremely rare cognomen. The cognomen สุนทรหฤทัย is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สุนทรหฤทัย | Thailand |