Paul Thieme agreed with this principal feature, but clarified that while the wealth of archaic elements in the "Bahram Yasht" clearly point to the pre-Zoroastrian era, the interpretation of proper names is "highly conjectural", and "in no case do we get a decisive argument against their Indo-Aryan or old Indic character" Adopting "the exact linguistic and exegetic analysis" of Benveniste and Renou, Thieme concludes "Proto-Aryan "*Indra" has assumed the functions of a Proto-Aryan god "*Vrtraghna"." Noting that "Vrtrahan" is the name of Indra only in the later Sanskrit texts (but not in the Rig Veda), Thieme adds "there is no valid justification for supposing that the Proto-Aryan adjective "*vrtraghan" was specifically connected with "*Indra" or any other particular god."