Where does “ꦮꦫꦸꦁ” come from?

ꦮꦫꦸꦁ (Javanese) comes from Kawi warung, from Proto-Mon-Khmer ruuŋ.

Ancestry of “ꦮꦫꦸꦁ”, step by step

Step	Language	Word	Meaning
1	Kawi	warung	—
2	Proto-Mon-Khmer	ruuŋ	—