Family name ยงวาณิช (ยงวาณิช 
, Yongvanich 
) , worldwide, is a very rare cognomen. The family name ยงวาณิช is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ยงวาณิช | Thailand |
| Yongvanich | United States, Thailand |