Just of Lyon was a 4th-century bishop who served as the 13th leader of the see in Lyon, Gaul. Born into an aristocratic family in Tournon-sur-Rhône, he was known for his merciful nature and scholarly intellect. After participating in significant ecclesiastical gatherings such as the Council of Valence and the Council of Aquileia, he resigned his position following a tragic incident involving a fugitive seeking sanctuary. Seeking a life of penance, he traveled to Egypt to live as a hermit among the monks of Scetes.