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.
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; and St. Romanos the Singer (or "the Melodist").