Cognomen ฟาย (Fai 
, ฟาย 
) , worldwide, is a common surname. The family name ฟาย is characteristic of Malaysia, where it is quite a common surname, Macao, and Hong Kong (explore the name in all countries). In absolute terms, it is the most numerous in Malaysia, Hong Kong, and Indonesia. Also, ฟาย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fai | Hong Kong, Taiwan, Indonesia, Malaysia, China |
| ฟาย | Thailand |