Family name Nookao (Nookao 
) , all around the world, is a very rare cognomen. The last name Nookao is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Nookao | Thailand |
Opas, Paeophan, Atitaporn, Phakthima, and Thanathathai