Cognomen บุญใหญ่ (Bunyai 
, Boonyai 
, บุญใหญ่) , in the world, is a rare family name. The surname บุญใหญ่ is habitual in Thailand, where it is a rare surname, Romania, and Malaysia, where it is a very rare surname. Much less frequently, บุญใหญ่ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bunyai | Thailand, United States, Malaysia, India, Romania |
| Boonyai | United Kingdom, Thailand |
Boonag, Boonakg, Boondaung, Boonehuay, Boonnac, Boonyait, Boonyakaid, Boonyakaite, Boonyakead, Boonyasingh, Boonyig, Boonykait, Boonyouang, and Booonak
| จุมพฏ บุญใหญ่ TH (b. 1954) |
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| นพพันธ์ บุญใหญ่ Thai actor, TH (b. 1980) |
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