Where does “Արշակունյաց” come from?

Արշակունյաց (Armenian) comes from Old Armenian Արշակունեաց, from Old Armenian Արշակունի, from Old Armenian -ունի, from Old Armenian -ուն, from Proto-Indo-European -o-mno-, from Proto-Indo-European -o-meno- — adverbial suffix of neuter gender.

Արշակունյաց (Armenian): of or pertaining to the Arsacid dynasty

Definitions

of or pertaining to the Arsacid dynasty

Ancestry of “Արշակունյաց”, step by step

Step	Language	Word	Meaning
1	Old Armenian	Արշակունեաց	—
2	Old Armenian	Արշակունի	Arsacid
3	Old Armenian	-ունի	forming adjectives; denoting a member of a...
4	Old Armenian	-ուն	forming adjectives from verbs and rarely from...
5	Proto-Indo-European	-o-mno-	—
6	Proto-Indo-European	-o-meno-	adverbial suffix of neuter gender

Every word from Proto-Indo-European -o-meno- →Every word from Old Armenian -ուն →Every word from Old Armenian -ունի →