Cognomen พยัฆ (Phayak 
, พยัฆ ) , across the world, is a rare surname. The surname พยัฆ is characteristic of Thailand, where it is a rare surname, Singapore, and India, where it is an extremely rare surname. Much less frequently, พยัฆ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phayak | Singapore, Thailand, United States, India, Myanmar |
| พยัฆ | Thailand |