Family name Koedkaen (Koedkaen 
) , all over the world, is a very rare cognomen. The surname Koedkaen is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Koedkaen | Thailand |
Wanich, Sansoen, Kingkaew, and Naphassorn