of the territory before the O Hynes clan but were exiled from the territory probably in the years following the Anglo-Norman invasion of Connacht. Under the patronage of the O Donnells of Ulster the O Clearys went on to become one of the most famous learned families in Europe. Tighearnach Ua Cleirigh, King of Ui Fiachrach Aidhne, died 916 Mícheál Ó Cléirigh (ca. 1590–1643), chief author of the Annals of the Four Masters. See also Cléircheán of Saintclerans Ó Cathail This family were forcibly expelled as a result of dynastic conflicts. Thereafter the Ó Cathail family remained a minor sept without any political power. Cathal mac Ógán, ancestor of the Ó Cathail family, fl. 10th-century. Gilla Mo Choinni Ua Cathail, king of Ui Fiachrach Aidhne, died 1147 Ó Seachnasaigh Up until the late 17th century the O Shaughnessys held the sub district of Uí Fhiachrach Aidhne known as Cenél Áeda na hEchtge, which was also their clan name. Cenél Áeda na hEchtge consisted roughly of the civil parishes of Beagh, Kilmacduagh and Kiltartan and also parts of the civil parishes of Kibeacanty and Kilthomas. In the 1690s the O Shaughnessys had their lands confiscated for supporting the Jacobite cause against William of Orange. A legal battle raged on into the first half of the 18th century between the O Shaughnessys and the Prendergasts, the family who were granted the O Shaughnessy lands, with the O Shaughnessys eventually losing the case. The senior line of the O Shaughnessys appears have died out in the 1780s. Seachnasach mac Donnchadh, namesake O'Shaughnessy, fl. 10th century. Sir Roger O'Shaughnessy, Knight and Chief of the Name, fl. 1567. Roger O'Shaughnessy, The Ó Seachnasaigh (died 1690), knight and jacobite William O'Shaughnessy, The Ó Seachnasaigh, Major-General, 1673–1744. Arthur William Edgar O'Shaughnessy (1844–1881), poet. Ó hEidhin This family were driven to the coast of Galway Bay and their principal home became Dunguaire Castle. The Irish annals contain some references to the family: AI1057.3 Flaithbertach Ua hEidin's son, king of Uí Fhiachrach, was slain. M1578.10. O'Heyne (Rory of the Derry, son of Flan, son of Conor, son of Flan) died. From the beginning of his career until his death he was a man distinguished for hospitality and prowess. His brother's son, Owen Mantagh, son of Edmond, was installed in his place. Noted bearers of the name include: Eidhean mac Cléireach, fl. 800, ancestor of the Ó hEidhin/Hynes family of