Gillabhrenainn Ua hAnradhain (died 1134) was Abbot of Clonfert.Annals of the Kingdom of Ireland, Volume 3, O'Clery, O'Clery, O'Mulconry and O'Duigenan page 1047
See also Corpus of Electronic Texts
References
Annals of Ulster at CELT: Corpus of Electronic Texts at University College Cork Annals of Tigernach at CELT: Corpus of Electronic Texts at University College Cork Revised edition of McCarthy's synchronisms at Trinity College Dublin. Byrne, Francis John (2001), Irish Kings and High-Kings, Dublin: Four Courts Press,