Cognomen ทองกัญญา (Thongkanya 
, ทองกัญญา , Tongkanya ) , throughout the world, is a rare surname. The surname ทองกัญญา is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ทองกัญญา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thongkanya | China, Thailand |
| Tongkanya, Thongganya, ทองกัญญา | Thailand |