Cognomen สุนันทาสุข (สุนันทาสุข 
, Sununtnasuk 
) , worldwide, is a very rare last name. The family name สุนันทาสุข is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สุนันทาสุข | Thailand |
| Sununtnasuk | United States, Thailand |