Cognomen ทัศนาลัย (ทัศนาลัย 
, Tassanalai , Tasanalai 
) , across the world, is a rare last name. The family name ทัศนาลัย is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Also, ทัศนาลัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thassanalai, Tassanalai, ทัศนาลัย | Thailand |
| Tasanalai | United States, Thailand |
Tatsanalai, and Thatsanalai