Catholic Encyclopedia: Saints Romanus
- Mentions and gives brief profiles of several saints of this name, including a Roman martyr who was the companion of St. Lawrence; St. Romanus of Caesarea; a fourth-century French priest; St. Romanus of Condat; St. Romanus of Auxerre; St. Romanus of Rouen;
- http://www.newadvent.org/cathen/13163a.htm

Catholic Encyclopedia: Saints Ronan
- There are twelve saints named Ronan in the Martyrology of Donegal. Article has brief sketches of: St. Ronan of Ulster; St. Ronan, Abbot of Drumshallon; St. Ronan Fionn; St. Ronan of Iona; and St. Ronan of Lismore.
- http://www.newadvent.org/cathen/13180a.htm

Catholic Encyclopedia: Saints Rufinus
- Eleven saints named Rufinus are mentioned in the Roman Martyrology.
- http://www.newadvent.org/cathen/13221b.htm

Catholic Encyclopedia: Saints Rufus
- Ten saints named Rufus are included in the Roman Martyrology.
- http://www.newadvent.org/cathen/13222b.htm

Catholic Encyclopedia: Saints Rufina
- Brief notices on four saints named Rufina: a Roman martyr, a Spanish martyr, a St. Rufina venerated in Cappadocia, and a martyr in Campania.
- http://www.newadvent.org/cathen/13221a.htm