Surname ธนาสัย (ธนาสัย 
) , worldwide, is a very rare cognomen. The family name ธนาสัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ธนาสัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ธนาสัย | Thailand |