Where does “աղախնայք” come from?

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

Ancestry of “աղախնայք”, step by step

Step	Language	Word	Meaning
1	Old Armenian	-այք	forming collective nouns
2	Old Armenian	-այ	—
3	Old Armenian	-ք	plural nominative case marker; forming names of...
4	Proto-Indo-European	-s	Derives nouns from roots

Every word from Proto-Indo-European -s →Every word from Old Armenian -ք →Every word from Old Armenian -այք →