Where does “Цхинвал” come from?

Цхинвал (Ossetian) comes from Georgian ცხინვალი, from Old Georgian krtskhinvali, from Old Georgian krtskhilvani.

Ancestry of “Цхинвал”, step by step

Step	Language	Word	Meaning
1	Georgian	ცხინვალი	—
2	Old Georgian	krtskhinvali	land of hornbeams
3	Old Georgian	krtskhilvani	—

Цхинвал — Etymology, Origin & Word History | Etymology Explorer