Fhirbhisigh states they belong to the Ui Dhuinn (O’Dunn) and, therefore, would be an Uí Failghi tribe according to his transcription. This is echoed by the modern scholar, Bart Jaski. Ua Caollaidhe (O'Kealy, O'Coely, Quealy) of Uí Bercháin (Ibercon) Mac Braoin (MacBreen, Breen) of Na Clanna Ua Bruadair (O'Broder, Broderick) of Uí nEirc (Iverk) Ua nDeaghaidh (O'Dea) of Uí Dheaghaidh (Ida) Notable nobility An important Ossorian genealogy for Domnall mac Donnchada mac Gilla Patric is preserved in the Bodleian Library, MS Rawlinson B 502, also known as The Book of Glendalough, tracing the medieval Mac Giolla Phádraig dynasty back to Óengus Osrithe, who supposedly flourished in the first or second century. Óengus Osrithe the first recorded king and namesake of the kingdom is the semi-legendary Óengus Osrithe, who lived in either the first or second century (circa 100 A.D.). Loegaire Birn Buadach gave his early epithet to the ruling lineage amongst the Ossorian people, the "Dál Birn" (lit. "the portion of Birn"). Cerball mac Dúnlainge (King of Osraige from 846 to 888; King of Dublin from 872 to 887; Earl of Orkney prior to 888) A celebrated king of Osraige (and likely Osraige's most famous monarch) was Cerball mac Dúnlainge, who ruled Osraige vigorously from c. 846 to his death in 888 and was the direct male progenitor of the later medieval Mac Giolla Phádraig dynasts. The Icelandic Landnámabók describes Cerball (Carroll) (Kjarvalur) as ruler of Dublin and Earl of Orkney and opens with a list of the most prominent rulers in Viking-age Europe, listing this Ossorian king alongside Popes Adrian II and John VIII; Byzantine Emperors Leo VI the Wise and his son Alexander; Harald Fairhair, king of Norway; Eric Anundsson and his son Björn Eriksson rulers of Sweden; Gorm the Old, king of Denmark; and Alfred the Great, king of England. Cerball features prominently in the annals and other historical texts, especially in The Fragmentary Annals of Ireland as an archetype of a Christian king who consistently vanquishes his enemies, especially pagan Vikings. In this chronicle, Cerball is recorded allying with rival bands of Vikings to defeat them during his early career as king. He was also close enough to the Norse–Gaels that he features under the name "Kjarvalr Írakonungr" in several medieval Icelandic pedigrees through his daughters. Cerball was likely the most powerful king of his day in Ireland, even plundering the lands of his brother-in-law the