Ó Dálaigh
Overview
The Ó Dálaigh were a learned Irish
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 bardic
Bardic poetry
Bardic Poetry refers to the writings of poets trained in the Bardic Schools of Ireland and the Gaelic parts of Scotland, as they existed down to about the middle of the 17th century, or, in Scotland, the early 18th century. Most of the texts preserved are in Middle Irish or in early Modern Irish,...

 family who first came to prominence early in the 12th century, when Cú Connacht Ó Dálaigh
Cú Connacht Ó Dálaigh
Cú Connacht Ua Dálaigh, , died 1139.-Overview:Cú Connacht was a member of the Ó Dálaigh bardic family, originally from County Westmeath. Branches of the family would settle in all four provinces of Ireland. His is the earliest recorded use of the name Ó Dálaigh.Cú Connacht died at the monastery of...

 was described as "The first Ollamh of poetry in all Ireland" (ollamh is the title given to university professors in Modern Irish).
The name Ó Dálaigh means 'descendant of Dálach'. The derivation of the personal name Dálach is not entirely obvious, but the most widely accepted theory is that it derives from the same root as dáil meaning "assembly;" the Irish Parliament is called 'Dáil Éireann
Dáil Éireann
Dáil Éireann is the lower house, but principal chamber, of the Oireachtas , which also includes the President of Ireland and Seanad Éireann . It is directly elected at least once in every five years under the system of proportional representation by means of the single transferable vote...

.' Dálach therefore probably meant "assemblyman" or "councillor."
The earliest records of the family place them in the region of Tethba
Tethbae
Tethbae, also Tethba and other variants, and often anglicized Teffia, was a region of Ireland in the Middle Ages. It was divided into two distinct kingdoms, north Tethba, ruled by the Cenél Coirpri, and south Tethba, ruled by the Cenél Maini...

 in what is now Westmeath, their lands were in Moyashel & Magheradernon barony, Westmeath.
 
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