>
Cognomen Ngernsayam (Ngernsayam ) , across the world, is a very rare last name. The surname Ngernsayam is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ngernsayam | Thailand |
Boonpa, Wantana, Teerasak, Suttichai, and Watchareeporn