Where does “Գարեգին” come from?

Գարեգին (Old Armenian) comes from Old Armenian գին, from Proto-Indo-European *wósn̥.

Ancestry of “Գարեգին”, step by step

Step	Language	Word	Meaning
1	Old Armenian	գին	price; value; buying, purchasing; hiring price
2	Proto-Indo-European	*wósn̥	—

Գարեգին — Etymology, Origin & Word History | Etymology Explorer