6th century. The deacon Saint Colman was a disciple of Saint Columcille.
He founded and governed the abbey at Reachrain (now called Lambay
Island) in Dublin
(
Benedictines).
Troparion of St Colman McRoi tone 6
Disciple of Saint Colum Cille,/ thou didst return to his native land and
found a monastery at Dublin./ As thou dost now stand before Christ with
the Angels/ pray, O Colman, that those who hymn thee may obtain His
great mercy.