Cognomen Noonwao (Noonwao 
) , globally, is a very rare surname. The last name Noonwao is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Noonwao | Thailand |
Nanon, Ninnate, Waraporn, Thanomchit, and Nattawadee