Gérétran of Bayeux
Gérétran of Bayeux, also known as Geretrandus, was bishop of Bayeux in the 5th century. He is considered a pre-congregational saint by the Roman Catholic Church, though because of the unstable times in which he lived, very little is known of his life. During the Viking invasion he undertook moving the remains of saint  Exuperius to a more safe location where they remain to this day. References 

Bayeux
Catholic saints
5th-century Christian saints
Year of birth unknown
Year of death unknown