Surname ศิริวัฒนานนท์ (ศิริวัฒนานนท์ 
, Siriwattayanont , Siriwatnanon ) , across the world, is a rare last name. The surname ศิริวัฒนานนท์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Siriwattayanont, Siriwatnanon, ศิริวัฒนานนท์, Siriwatjananon | Thailand |
Siriwatananon, Siriwattananon, Siriwatthananon, and Siriwatyanont