Cognomen Toại (Toại 
) , worldwide, is a rare surname. The cognomen Toại is habitual in South-eastern Asia, particularly Vietnam, where it is a rare surname. Also, Toại is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Toại | Vietnam |
| ðaminh toại VN (b. 1811) |
|
|
| dominic toại |
|