- 2nd Sunday in August
Son of Saint Claudio and Saint Prepedigna, grandson of Saint Maximus, brother of Saint Alexander and Saint Acucio. Murdered at the age of 4 years and 8 months in the persecutions of Diocletian in an attempt to get the rest of the family to renounce Christianity. It failed.
- c.295 at Rome, Italy
- relics, including a phial of his blood, re-discovered in the catacombs of San Ippolito in the Campo Verano cemetery, Rome, Italy on 28 December 1831; identified by a plaque on the grave, which included his age at the time of murder
- relics enshrined in Rome, Italy
- relics enshrined in an urn in the church of San Quirico and Giuditta in Casabasciana, Bagni di Lucca, Italy in 1833 with the approval of Pope Gregory XVI
- “Saint Primo“. CatholicSaints.Info. 11 August 2016. Web. 26 February 2017. <>