Last name นิ่มสมบูรณ์ (นิ่มสมบูรณ์, Nimsomboon 
, Nimsombun ) , around the world, is a rare cognomen. The family name นิ่มสมบูรณ์ is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Nimsombun, Nimsomboon | United States, Thailand |