Surname Triwan (Triwan 
) , throughout the world, is a rare cognomen. The family name Triwan is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, Indonesia, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Likewise, Triwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Triwan | Malaysia, Thailand, Indonesia, India, United States |