Although most sources point to a patron in some form of the name Dochdwy, both A.W. Wade-Evans and Baring-Gould & Fisher give Cyngar as the patron. The correlation with Cyngar is first found in the writings of Iolo Morgannwg, although in medieval texts Cyngar and Dogwyn are linguistically related and a correlation between the patron and someone called Cyngar is a possibility, as in the case of Llandough near Cowbridge.