Cognomen Ngaochaiyaphum (Ngaochaiyaphum 
) , throughout the world, is a very rare family name. The family name Ngaochaiyaphum is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ngaochaiyaphum | Thailand |
Urarak, and Gunlayanee