ฅน

Usage notes
Historically, ค น was never written as  ฅ น (written with the now-obsolete letter ฅ ).

The variation stemmed from the corruption of the name of the letter ฅ : it used to be called ฅ  ฅ อ ค น (kɔɔ kɔɔ-kon, “neck of a person”), but that has gradually been corrupted to become the current name  ฅ ค น (kɔɔ kon, “person”), resulting in the use of  ฅ น to represent  ค น.

Nowadays, ฅ น is occasionally used in book, movie, or TV program titles and such usage is considered a neologism.