Family name ธัญวรรณ์ (ธัญวรรณ์ 
) , all over the world, is a very rare cognomen. The cognomen ธัญวรรณ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ธัญวรรณ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ธัญวรรณ์ | Thailand |