Ruadán mac Fergusa Birn, also known Rowan, Ruadon, Roadan, Ruadhán, Rodon and Rodan, was an Irish Christian abbot who founded the monastery of Lorrha, near Terryglass. He was known for his prophecies. After his death, he was venerated as a saint and as one of the "Twelve Apostles of Ireland". His feast day is 15 April.