Last name แก่น (Kaen 
, Pith 
, Core ) , all over the world, is a common surname. The cognomen แก่น is habitual in Estonia, where it is quite a rare surname, Uruguay, and Ireland. Not in comparison with a country's population, the name is most common in the United States, Indonesia, and Italy. Likewise, แก่น is the forename as well as the last name.