The paper presents a comparative analysis of the Pahlavi “Story of Jōišt ī Friyān”, comparing it with three other tales, which span several hundred years and belong to several cultural traditions. By isolating structural and content-related features from the narrative core of these tales and setting them into relation with each other, the present author attempts to answer the following questions. Are there meaningful parallels between these four tales, which would suggest literary borrowing? And, if there are, would it be possible to identify one of them as the primary source of the others? The study is intended to contribute to our understanding of the process of literary exchange between Zoroastrians and Muslims in early Mediaeval Iran.