Baron Inchiquin passed to his male heirs through his son Dermot. The Earldom went extinct at the death of Henry O'Brien, 8th Earl of Thomond, the next heir would have been a descendant of Daniel O'Brien, 3rd Viscount Clare who was attainded in 1691, so the title became forfeit. However, Charles O'Brien, 6th Viscount Clare, a Jacobite exile used the title Earl of Thomond, as did his son, who died childless in 1774. At the death of James O'Brien, 3rd Marquess of Thomond, the title Baron Inchiquin passed to a distant cousin and descendant of Murrough, Sir Lucius O'Brien, 5th Baronet and was passed down to his descendants. This early list of Dál gCais Kings is supplied in An Leabhar Muimhneach. Key: = King of Northern Deisi = King of Thomond = Baron Inchiquin =Viscount Clare =Earl of Thomond, Earl of Inchiquin =Marquess of Thomond A higher Kingship title which is mutually inclusive with a lower one within the dynasty are not given overlapping dates for the simplicity of the chart. Annalistic references AI1021.2 Mael Muire Ua Gébennaig, eminent priest of Dál Cais, rested.Legacy In two different election pamphlets, Éamon de Valera's Fianna Fáil party addressed voters as "Dalcassians", the term having become a romantic synecdoche for the Irish as a whole. See also Irish nobility Irish royal families Notes References Footnotes Bibliography Byrne, Francis John, Irish Kings and High-Kings. Four Courts Press. 2nd edition, 2001. MacLysaght, Edward, Irish Families: Their Names, Arms and Origins. Irish Academic Press. 4th edition, 1998. O'Brien, Barry, Munster at War''. Cork: Mercier Press. 1971. Todd, James Henthorn (ed. and tr.), Cogadh Gaedhel re Gallaibh: The War of the Gaedhil with the Gaill Longmans. 1867. "Dál gCais – Church and Dynasty", Donncha Ó Corráin, External links Tribes and Territories of Northern Munster: Dál gCais The Tribe of Cas at DalcassianSept.com Irish Type III at IrishType3DNA.org R-L226 Project at Family Tree DNA Gaelic-Irish nations and dynasties History of County Clare History of County Limerick History of County Tipperary Gaels