Four names are associated with the task of executing the Pope's wishes; these include the early Welsh saints Fagan, Deruvian and Elvan. Fagan is sometimes named as "the first Bishop of Llandaff" while all three became patrons of churches and villages throughout the diocese. Iolo Morgannwg also linked these early figures to Llandaff, writing extensively on this supposed early foundation. In the Iolo Manuscripts, he credits Fagan as the second Bishop of Llandaff (succeeding Dyfan, a figure Iolo conflates with Deruvian).Bartrum (2009), "Duvianus (1)", p. 236.Williams, John. The Ecclesiastical Antiquities of the Cymry: or the Ancient British Church; Its History, Doctrine, and Rites, p. 73. W.J. Cleaver (London), 1844.
four names are associated with the task of executing the pope's wishes; these include the early welsh saints fagan deruvian and elvan fagan is sometimes named as "the first bishop of llandaff" while all three became patrons of churches and villages throughout the diocese iolo morgannwg also linked these early figures to llandaff writing extensively on this supposed early foundation in the iolo manuscripts he credits fagan as the second bishop of llandaff (succeeding dyfan a figure iolo conflates with deruvian)bartrum (2009) "duvianus (1)" p 236williams john the ecclesiastical antiquities of the cymry or the ancient british church; its history doctrine and rites p 73 wj cleaver (london) 1844