Cognomen บุญญาเดช (บุญญาเดช 
, Boonyadate 
) , worldwide, is a rare family name. The last name บุญญาเดช is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, บุญญาเดช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| บุญญาเดช | Thailand |
| Boonyadate | United States, Thailand |