a general geographical term used by some Greek and Roman authors of ancient period for a district of wide extent between Central Asia and the Indus River, comprehending the eastern provinces of the Achaemenid Empire that covered entire modern-day Afghanistan, east and southeast of Iran, Tajikistan and northwestern Pakistan
Origin
Modern simplification of Arianna, Ariane and Arianne, all forms of the Greek name Ariadne ("most holy"; Cretan Greek αρι (ari) "most" and αδνος (adnos) "holy"). There has been some confusion with the similar sounding Adriana and Adrienne.