Paul Aurelian was a 6th-century Welshman who became first bishop of the See of Léon and one of the seven founder saints of Brittany. He allegedly died in 575, rumoured to have lived to the age of 140, after having been assisted in his labors by three successive coadjutors. This suggests that several Pauls have been conflated. Gilbert Hunter Doble thought that he might have been Saint Paulinus of Wales.

The Diocese of Quimper (–Cornouaille) and Léon is a Latin Church ecclesiastical territory or diocese of the Catholic Church in France. In 1853, the name was changed from the Diocese of Quimper (–Cornouaille) to the Diocese of Quimper (–Cornouaille) and Léon.