(Maurice O'Kelly; died 1407 or 1409) was Archbishop of Tuam in Ireland, and patron of the literary compilation An Leabhar Ua Maine.
It includes a series of metrical dindsenchas, An Banshenchas, poems, genealogies and pedigrees.
The largest single section is devoted to the origins and genealogies of the Ó Cellaigh dynasty of Ui Maine, its contents updated to the time of compilation.
[citation needed] Ó Ceallaigh has been described as "a learned and witty prelate" and was in favour with the Pope.
[1] He was elected archbishop of Tuam in the summer of 1392, but not translated from Clonfert until 26 January 1393.