Gilla Ceallaigh Ua Cleirigh (died 1003) was King of Ui Fiachrach Aidhne.
Gilla Ceallaigh was the next-to-last of the Ua Cleirigh kings of Aidhne. From this time on, the family lost power and eventually became an ecclesiastical family. Members included:
Conchobhar Ua Cleirigh, lector of Kildare, died 1126 Gilla Isa Ó Cléirigh, Bishop of Leyny (Achonry), died 1230
His descendants would eventually become the Ó Cléirigh Bardic family.
References http://www.clarelibrary.ie/eolas/coclare/genealogy/hynes_family.htm Irish Kings and High-Kings, Francis John Byrne (2001), Dublin: Four Courts Press, CELT: Corpus of Electronic Texts at University College Cork