Riagail Irish monk (fl. 573–600) From Wikipedia, the free encyclopedia Riagail, aka Regulus, Irish monk, fl. 573–600. Riagail was an Irish monk expelled from Ireland with Columba. See also Riagail of Bangor, died 881. External links http://www.ucc.ie/celt/published/T201040/index.html This biography of an Irish religious figure is a stub. You can help Wikipedia by adding missing information.vte This biographical article about a person in connection with Christianity is a stub. You can help Wikipedia by adding missing information.vte Related Articles