Surname Viyanat (Viyanat 
) , worldwide, is a very rare family name. The family name Viyanat is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Viyanat is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Viyanat | India, Thailand |
Lakkhana, Taraporn, Worachet, and Boonyaporn