[[File:Ancient Parthian relief carving of the god Nergal from HatraAncient_Parthian_relief_carving_of_the_god_Nergal_from_Hatra.jpgjpeg|thumb|350px|Syncretic [[Parthian art|Parthian]] relief carving of Bahram (Nergal) from Hatra in [[Iraq]], dating to the 1st or 2nd century AD]]
'''ウルスラグナ'''(Vərəθraγna、Verethragna)とは、ゾロアスター教において崇拝される英雄神<ref name="Kuehn2011">Sara Kuehn, The Dragon in Medieval East Christian and Islamic Art: With a Foreword by Robert Hillenbrand, https://books.google.com/books?id=AZWgdBCgmLYC, 12 July 2011, BRILL, isbn:978-90-04-18663-7, page103</ref><ref name="Fragner1995">Bert G. Fragner, Proceedings of the Second European Conference of Iranian Studies: Held in Bamberg, 30th September to 4th October 1991, by the Societas Iranologica Europaea, https://books.google.com/books?id=-y46AQAAMAAJ, 1995, Istituto italiano per il Medio ed Estremo Oriente</ref>。