Family name อุปวานิช (Varnish 
, อุปวานิช 
) , in the world, is a rare last name. The cognomen อุปวานิช is habitual in Australia, where it is a rare surname, the United Kingdom, and Switzerland, where it is a very rare surname. In absolute terms, this name is the most popular in the United Kingdom, the United States, and Australia. Very seldom, อุปวานิช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Varnish | Australia, United Kingdom, India, United States, Nigeria |
| อุปวานิช | Thailand |