Surname Simaphon (ศิมาภรณ์ 
, สิมาภรณ์ , Simaphon 
) , across the world, is a very rare family name. The surname Simaphon is habitual in Thailand, where it is a rare surname, and Brazil, where it is an extremely rare surname. More frequently, Simaphon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สิมาภรณ์, ศิมาภรณ์ | Thailand |
| Simaphon | Brazil, Thailand |