Where does “Yathi” come from?

Yathi (English) comes from Sanskrit यति, from Sanskrit यत्, from Old Turkic yat-, from Proto-Indo-European yet- — to establish oneself, place firmly.

Ancestry of “Yathi”, step by step

Step	Language	Word	Meaning
1	Sanskrit	यति	a disposer; ‘a striver’, an ascetic, devotee, one...
2	Sanskrit	यत्	to place in order, marshal, join, connect; to...
3	Old Turkic	yat-	to bend, incline; to lie
4	Proto-Indo-European	yet-	to establish oneself, place firmly