Noble savage
Hayy ibn Yaqdhan an Islamic philosophical tale (or thought experiment) by Ibn Tufail from twelfth-century Andalusia, straddles the divide between the religious and the secular. The tale is of interest because it was known to the New England Puritan divine, Cotton Mather. Translated in to English (from Latin) in 1686 and 1708, it tells the story of Hayy, a wild child,  raised by a gazelle, without human contact, on a deserted island in the Indian Ocean. Purely through the use of his reason, Hayy goes through all the gradations of knowledge before emerging into human society, where he revealed to be a believer of Natural religion, which Cotton Mather, as a Christian Divine, identified with Primitive Christianity. The figure of Hayy is both a  Natural man and a Wise Persian, but not a Noble Savage.