Where does “LHA” come from?

LHA (English) comes from Tibetan ལྷ, from Proto-Sino-Tibetan m-hla — soul; god; demon.

Ancestry of “LHA”, step by step

Step	Language	Word	Meaning
1	Tibetan	ལྷ	god, deity
2	Proto-Sino-Tibetan	m-hla	soul; god; demon

LHA — Etymology, Origin & Word History | Etymology Explorer