Last name นวลสวัสดิ์ (Nualsawat 
, นวลสวัสดิ์ , Nuanswat ) , in the world, is a very rare cognomen. The family name นวลสวัสดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, นวลสวัสดิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nualsawat | United States, Thailand |
| นวลสวัสดิ์, Nuanswat | Thailand |
| Nualsawad | United States |
Naulsawat, Naunsawasdi, Naunsawat, Nualsawa, Nualsawas, Nuansahwat, Nuansawa, Nuansawad, Nuansawart, Nuansawas, and Nuansawat