Ó Cléirigh

Ó Cléirigh
Country Kingdom of Connacht
Parent house Uí Fiachrach Aidhne
Founder Cleireach mac Ceadach
Final ruler Mhic Mac Comhaltan Ua Cleirigh
Cadet branches Coulton

O'Cleary (Irish: Ó Cléirigh) is the surname of a learned Gaelic Irish family whose members appear in historical records dating to the mid-Medieval Period. The O'Clearys were descended from the Connachta's Uí Fiachrach kindred and had been rulers of Uí Fiachrach Aidhne, a kingdom in what is now the south of County Galway. The name of the family means descendent or son of the cleric.

The family were subsequently expelled from their land by their cousins, the Clan Ó Seachnasaigh (O'Shaughnessy). From the early 11th or 12th century, they were based in Tír Chonaill, located in modern-day County Donegal, where they served as poet-historians, scribes and secretaries to the O'Donnell dynasty of Tyrconnell. They authored the Ó Cléirigh Book of Genealogies.

Naming conventions

The name has been Anglicised variously as O'Clery, Cleary, Clark, Clarke and Clarkson.

Male Daughter Wife (Long) Wife (Short)
Ó Clérigh[1] Ní Chlérigh Bean Uí Chlérigh Uí Chlérigh


Notable members of the clan included:

Ó Cléirigh




Other institutions

See also


  1. "Ó Clérigh". Sloinne. 5 December 2015.


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