Fifth or sixth century.
From various accounts, it would appear, the Church of Derrykeighan must have
been one of the oldest foundations in Ireland. Its first administrator is
stated to have been brother to St. Mochay, who died
towards the close of the fifth century. Colman Muilinn is simply entered in
the "Martyrology of Tallagh," on this day. He belonged to a place known as
Derrykeighan, in the county of Antrim, and within the
diocese of Connor. Further particulars concerning him we read in the
"Martyrology of Donegal."9 There it is stated that Colman Muilinn, of
Doire-Chaechain," belonged to Dal-Riada, in Ulster. Bronach, daughter of
Milchu," son to Buan, is said to have been his mother. We are informed,
likewise, that it was in a mill St. Colman used to make obeisance to the
brethren. No clue to the date of his death can be
found in our Annals
(
O'Hanlon).