Family name เอ๋า (Ao 
, Eaaw 
, เอ๋า) , in all the world, is a widespread surname. The family name เอ๋า is characteristic of Macao, where it is a widespread surname, Mozambique, where it is quite a common surname, and China, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in China, India, and Macao. Very seldom, เอ๋า is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ao | Mozambique, Macao, India, Japan, China |
| Eaaw | Brazil |