Last name สุวานิช (Suwanit 
, สุวานิช , Suwanich ) , in the entire world, is a rare cognomen. The family name สุวานิช is characteristic of Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Likewise, สุวานิช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Suwanit | India, United States, Thailand |
| สุวานิช | Thailand |
| Suwanich, Suvanich | United States, Thailand |