Family name เฒ่า (Thao 
, Old 
, เฒ่า) , across the world, is a common surname. The surname เฒ่า is habitual in Macao, where it is quite a common surname, Vietnam, and Laos. Not in comparison with a country's population, this name is the most popular in Vietnam, the United States, and Malaysia. Likewise, เฒ่า is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thao | Malaysia, Laos, Vietnam, United States, United Kingdom |
| Old | Malaysia, Indonesia, United States, United Kingdom, Taiwan |