Last name แก่นมั่น (Core 
, แก่นมั่น) , in the entire world, is a common family name. The surname แก่นมั่น is habitual in Uruguay, where it is quite a rare surname, Ireland, and Albania. In absolute terms, the name is most common in the United States, Indonesia, and Italy. Very seldom, แก่นมั่น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Core | France, Italy, United Kingdom, United States, Indonesia |