An Etymological Dictionary of the German Language/Paradies
Paradies, n., ‘paradise,’ from MidHG. paradîse, paradîs, pardîs (its accent fluctuates), n., OHG. paradîsi, paradîs, n. (MidHG. î explains the earlier ModHG. Paradeis). It corresponds to OSax. paradîs, Du. paradijs, MidE. paradise; the cognates are derived from the biblical and ecclesiastical paradîsus, παράδεισος (prop. ‘pleasure-ground, park’), which again is of Pers. origin. Comp. Zend pairidaeza, ‘rampart, enclosure.’