Cognomen ธัญญาเจริญ (ธัญญาเจริญ 
, Thanyayaroen, Tanyajarern ) , in all the world, is a very rare surname. The last name ธัญญาเจริญ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thanyajalurn, Tanyajarern, ธัญญาเจริญ | Thailand |