In the sixth century, when Saint Malo came into France, Aaron was abbot of a monastery in an island separated from the city of Aleth in Armorica by an arm of the sea, which the tide at low water left dry twice a day. This holy man gave Saint Malo a welcome reception, such as one of his character could not fail to meet with wherever virtue was esteemed. Saint Aaron shared with that holy pastor the glory of his apostleship, and his feast is kept in that diocess with the solemnity of a Lesser Double on the 22d of June. A parish church in the diocess of Saint Brieuc bears his name. The island in which his monastery stood was called from him the isle of Aaron, till, in 1150, John, surnamed de la Grille, bishop of Aleth, translated his see from that city into the church of Saint Malo, in this island, which before belonged to a monastery there. Aleth was deserted by its inhabitants, and the town of Saint Malo, which fills the whole island of Aaron, arose in its place.
- Father Alban Butler. “Saint Aaron, Abbot in Brittany”. , 1866. CatholicSaints.Info. 25 June 2013. Web. 25 October 2016. <>