Surname Twentynine (Twentynine 
) , worldwide, is a rare family name. The surname Twentynine is habitual in Brunei, where it is quite a rare surname, Myanmar, where it is a rare surname, and Saudi Arabia, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in South-eastern Asia, particularly Indonesia, Myanmar, and Brunei. Much less frequently, Twentynine is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Twentynine | Saudi Arabia, Myanmar, Malaysia, Brunei, Indonesia |