Imperial executioner who was so moved by the courage of the Christians he was murdering that he examined the faith and converted. Martyred with five companions during the persecutions of Emperor Septimius Severus.
- Book of Saints, by the Monks of Ramsgate
- Heiligen 3s
- Martirologio Romano, 2005 edition
- Our Sunday Visitor’s Encyclopedia of Saints
- Santi e Beati
- “Saint Porfirio“. Saints.SQPN.com. 30 January 2014. Web. 21 August 2014. <>