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.

• http://www.clarelibrary.ie/eolas/coclare/genealogy/hynes_family.htm
• Irish Kings and High-Kings, Francis John Byrne (2001), Dublin: Four Courts Press, ISBN 978-1-85182-196-9
• CELT: Corpus of Electronic Texts at University College Cork