Cognomen Siriwuth (Siriwuth 
) , globally, is an extremely rare surname. The surname Siriwuth is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Siriwuth is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siriwuth | United States, Thailand |
Krutthaka, Jaruphan, Wanthong, Manopotha, Wannathong, and Jantaranipapong