The Annals of Ulster for 1110 list the death of three Irish churchmen, including:
Ferdomhnach Dall fer leiginn Cille Dara .i. sui cruitirechta
Ferdomnach the blind, lector of Cell Dara, i.e. a master of harping
Ferdomhnach held the important post of fer leiginn (lector), an office associated with men such as Áed Ua Forréid (d. 1056) and Áed Ua Crimthainn (fl. 12th century), though it was also understood in the sense of a man of learning. He is perhaps the earliest attested Irish musician noted by name, specifically a sui cruitirechta/a master of harping.
None of Buckley's papers, given as sources, mention Ferdomhnach, Ferdomnach, cruitirechta (although there is some discussion of the cruit in "Musical Instruments"),leiginn, or lectors. I was unable to find a reference on the Irish Harp site for any of these keywords.
