Last name นิลโสภณ (นิลโสภณ 
, Nilsopon 
) , worldwide, is a very rare cognomen. The last name นิลโสภณ is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| นิลโสภณ | Thailand |
| Nilsopon | United States, Thailand |