Cognomen Ngọc Linh (Ngọc Linh 
) , in the entire world, is a rare last name. The last name Ngọc Linh is characteristic of South-eastern Asia, particularly Vietnam, where it is a rare surname. Likewise, Ngọc Linh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ngọc Linh | Vietnam, Japan |