Leontius of Fréjus was a 5th-century bishop who led the see of Fréjus in Provence. Likely born in Nîmes, he served as a prominent ecclesiastical leader during a period of significant monastic growth in southeastern Gaul. He is most notably remembered for his close relationship with Honoratus, the founder of Lérins Abbey, whom he ordained. His leadership helped establish early monastic privileges that balanced religious independence with episcopal authority. He is recognized as a saint in both the Catholic and Eastern Orthodox traditions.