Where does “우〮리〮” come from?

우〮리〮 (Middle Korean) comes from Old Korean 吾里, from Old Korean 又 — we, us.

Ancestry of “우〮리〮”, step by step

Step	Language	Word	Meaning
1	Old Korean	吾里	we; us; our
2	Old Korean	又	we, us

우〮리〮 — Etymology, Origin & Word History | Etymology Explorer