Samson of Dol was a Welsh saint, who is also counted among the seven founder saints of Brittany with Pol Aurelian, Tugdual or Tudwal, Brieuc, Malo, Patern (Paternus) and Corentin. Born in southern Wales, he died in Dol-de-Bretagne, a small town in north Brittany.

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.