Saints Ferreolus and Ferrutio (or Fargeau and Ferrutius; French: Ferréol et Ferjeux; Italian: Ferreolo e Ferruccio) (died ca.

[3] While aspects of their legend may not be entirely historical, it was likely based on someone named Ferreolus who assisted Irenaeus in spreading Christianity beyond Lyon.

[6] The two saints have been represented in stained glass, paintings, and statues in many churches and chapels in the two dioceses of the Franche-Comté: Saint-Claude and Besançon.

The hagiographer Alban Butler (1710–1773) wrote in his Lives of the Fathers, Martyrs, and Other Principal Saints, under 16 June, SS.

They were ordained by Saint Irenæus, and sent by him to preach the gospel at Besançon, where, after suffering many torments, they were beheaded for the faith in the persecution of Severus in 211 or 212.