"There is a large corpus of magical texts from Babylonia of the Sassanian Era, designed to exorcise demons. In these texts, which are mostly Jewish and Christian, the Indo-Iranian deities called daiva appear as demons. ...the demons of these texts are constantly appearing to women in the form of their husbands, and impregnating them. As a result, the names of the clients are always matronymic because no one could be sure of his paternity. ...both the Greeks and Iranians had such notions."