Where does “ꦭꦪꦁ” come from?

ꦭꦪꦁ (Javanese) comes from Old Javanese layaṅ, from Proto-Mon-Khmer slaʔ — leaf.

Ancestry of “ꦭꦪꦁ”, step by step

Step	Language	Word	Meaning
1	Old Javanese	layaṅ	—
2	Proto-Mon-Khmer	slaʔ	leaf

ꦭꦪꦁ — Etymology, Origin & Word History | Etymology Explorer