Family name ติยะวานิช (ติยะวานิช 
, Tiyavanich 
) , in all the world, is a very rare surname. The surname ติยะวานิช is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ติยะวานิช | Thailand |
| Tiyavanich | United States, Thailand |