Where does “ꦏꦩꦶ” come from?

ꦏꦩꦶ (Javanese) comes from Old Javanese kami, from Proto-Malayo-Polynesian kami, from Proto-Austronesian kami — we, us, our.

ꦏꦩꦶ (Javanese): we, us, our (exclusive of the person spoken to)