Cognomen บุญลัย (Boonlai 
, Bunlai 
, บุญลัย ) , around the globe, is a rare surname. The cognomen บุญลัย is habitual in Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and China, where it is an extremely rare surname. Also, บุญลัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Boonlai | Thailand, United States, Malaysia, China |
| Bunlai | Brazil, Thailand, United States, Malaysia |
| บุญลัย | Thailand |