Where does “Եդեսիա” come from?

Եդեսիա (Armenian) comes from Old Armenian Եդեսիա, from Ancient Greek Ἔδεσσα.

Ancestry of “Եդեսիա”, step by step

Step	Language	Word	Meaning
1	Old Armenian	Եդեսիա	—
2	Ancient Greek	Ἔδεσσα	—

Եդեսիա — Etymology, Origin & Word History | Etymology Explorer