Surname บุญเหล็ก (บุญเหล็ก 
) , across the world, is a very rare cognomen. The surname บุญเหล็ก is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, บุญเหล็ก is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| บุญเหล็ก | Thailand |