Philetus was a Christian martyr who lived during the early second century. According to historical accounts, he was a senator residing in the province of Illyria. He was executed in 121 during the persecutions carried out under the reign of Emperor Hadrian. He is traditionally honored alongside several family members, including his wife Lydia and their sons, Macedo and Theoprepius, as well as others such as Amphilochius and Cronidas.