köken: Short for 一(いっ)個(こ)人(じん) (ikkojin) or 各(かく)個(こ)人(じん) (kakukojin), from 一(いっ)個(こ)の人(ひと) (ikko no hito), a calque of English individual. Listed in the 1912 work 英独仏和哲学字彙 (Ei-Doku-Futsu-Wa Tetsugaku Jii, “Dictionary of English, German, and French Philosophical Terms”) as a translation of English individual.
köken: From บุคคล (bùk-kon, “person”) + ธรรมดา (tam-má-daa, “natural; ordinary”); calque of English natural person; perhaps first used in the revised Book 1 of the Siamese Civil and Commercial Code, promulgated on 11 November 1925.