... the Greek παράδεισος did not come from Hebrew, because here again there is no historical bridge between the two languages.  In Greek we trace the word to Xenophon, who brought it back from his repeated journeys in Persia, and who uses it in the sense of pleasure ground, or deer park.¹
    Lastly, we find the same word used in the LXX, as the name given to the garden of Eden, the word having been borrowed either a third time from Persia, or taken from the Greek, and indirectly from the works of Xenophon.
    This is the real history of the word.  It is an Aryan word, but it does not exist in Sanskrit.  It was first formed in Zend, transferred from thence as a foreign word into Hebrew, and again into Greek.  Its modern Persian form is firdaus. (Selected Essays on Language, Mythology and Religion, Müller, v.1, 1881)