Surname แก่นอิน (Kaenin 
, แก่นอิน) , around the globe, is a rare cognomen. The last name แก่นอิน is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, แก่นอิน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kaenin | United States, Thailand |