Where does “仁” come from?

仁 (Chinese) comes from Proto-Sino-Tibetan s/k-niŋ, from Proto-Sino-Tibetan s-nəw-k — brain.

Ancestry of “仁”, step by step

StepLanguageWordMeaning
1Proto-Sino-Tibetans/k-niŋbrain, heart, mind; heart; brain; mind
2Proto-Sino-Tibetans-nəw-kbrain
Every word from Proto-Sino-Tibetan s-nəw-k →Every word from Proto-Sino-Tibetan s/k-niŋ →
仁 — Etymology, Origin & Word History | Etymology Explorer