Where does “խարտոց” come from?

խարտոց (Old Armenian) comes from Old Armenian -ոց, from Proto-Indo-European -sḱo-.

Ancestry of “խարտոց”, step by step

Step	Language	Word	Meaning
1	Old Armenian	-ոց	Forming nouns with the meaning of place; Forming...
2	Proto-Indo-European	-sḱo-	—