Where does “Հնդիկք” come from?

Հնդիկք (Old Armenian) comes from Old Armenian -ք, from Proto-Indo-European -s — Derives nouns from roots.

Ancestry of “Հնդիկք”, step by step

StepLanguageWordMeaning
1Old Armenianplural nominative case marker; forming names of...
2Proto-Indo-European-sDerives nouns from roots
Every word from Proto-Indo-European -sEvery word from Old Armenian