Last name บุญยัง (บุญยัง 
, Bunyang 
, Boonyoung 
) , across the world, is quite a common cognomen. The last name บุญยัง is habitual in Thailand, where it is quite a common surname, and Germany, where it is a very rare surname. Also, บุญยัง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| บุญยัง | Thailand |
| Bunyang | India, United States, Thailand |
| Boonyoung | United Kingdom, United States, Thailand |
| Boonyang | Germany, United States, Thailand |
Boonsayoung, Boonsayung, Boonsoung, Boonthoung, Boontoung, Boonyiang, Boonyon, Boonyont, and Buyyang