St. 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 prophesies. After his death, he was venerated as a saint and as one of the "Twelve Apostles of Ireland". His feast day is 15 April.

Lorrha is a small village at the northern tip of County Tipperary, Ireland. Ledewich described village as 'Larah' which is the common name for the talk-motes, mote hills etc. P. Dixon Hardy M.R.I.A. describes it as 'Loragh'