The Tribe of Cas

Donogh, the youngest brother of Dermod, who is No. 122 on the "O'Brien" (Marquis of Thomond) pedigree, was the ancestor of this branch of that family:
122	Donogh; the third son of Murrough, the first Earl of Thomond; d. 1582. His father assigned to him the Castles and lands of Dromoland, Leamanagh, Ballyconnelly, Corcumroe, etc.; m. Slaine, dau. John MacNamara fionn, of Crathloe, and had one son and two daughters: I. Connor, of whom presently. I. Margaret. II. Finola, who m. Uaithne O'Loughlin, of Moyrin, in Clare.
123	Connor (who d. in 1603), of Leamanagh: son of Donogh; m. Slaine, dau. of Sir Turlogh O'Brien, of Dough Castle, and had a son:
124	Donogh (2), who was knighted by King Charles I., and who d. in 1634. This Donogh m. Honoria, dau. of Richard Wingfield, an ancestor of the Viscounts Powerscourt, and had three sons and one daughter: I. Connor, of whom presently. II. Donogh, of Tobbermaile. III. Murrough, who m. Hannah, dau. of his kinsman Turlogh O'Brien of Cluonan, and had a son named Teige. I. Margaret, who m. Turlogh, son of Teige O'Brien of Dromore.
125	Connor (2), of Leamanagh, who d. 1651: the eldest son of Donogh; m. Mary, dau. of Sir Turlogh MacMahon, and had two sons and two daughters: I. Sir Donogh, of whom presently. II. Teige, who m. the dau. of Captain Edward Fitzgerald, of Carrigowrane. I. Honoria, who married Donogh O'Brien, of Dough. II. Mary, who m. Donogh MacNamara.
126	Sir Donogh, of Leamanagh and Dromoland: son of Connor; d. 1717. Was created a Baronet on the 9th of Nov., 1686. He was twice married: first, to Lucia, dau. of sir George Hamilton, by whom he had a son Lucius, of whom presently; and secondly, to Eliza, dau. of Major Deane, by whom he had: II. Henry. I. Honoria. II. Elizabeth.
127	Lucius: son of Sir Donogh by his first marriage; d. (before his father) in 1717; m. Catherine, dau. of Thomas Keightley, of Hertfordshire, and had two sons and two daughters: I. Sir Edward, of whom presently. II. Thomas. I. Anne. II. Lucia.
128	Sir Edward, of Dromoland, M.P.: son of Lucius: was the second Baronet; d. 1765. Sir Edward m. Mary, dau. of Hugh Hickman, of Fenloe, and had: I. Sir Lucius-Henry, of whom presently. II. Donogh. III. Edward. I. Henrietta. II. Anne. III. Mary. IV. Catherine, who m. Charles MacDonnell, of New Hall, near Ennis. V. Lucia.
129	Sir Lucius-Henry, of Dromoland, M.P., the third Baronet: son of Sir Edward; d. 1795; m., in 1768, Nichola, dau. of Robert French, of Monivea Castle, in the co. Galway, M.P., and had: I. Sir Edward, of whom presently. II. Lucius. III. robert. IV. Donogh. V. Henry. I. Nichola. II. Henrietta. III. Catherine. IV. Lucy. V. Anna-Maria. VI. Charlotte.
130	Sir Edward, of Dromoland, the fourth Baronet, who d. in 1837; son of Sir Lucius-Henry; m. in 1799, Charlotte, dau. of William Smith, of Cahirmoyle, Newcastle West, in the county Limerick, and had: I. Sir Lucius, of whom presently. II. William Smith O'Brien, M.P. (b. 17th Oct., 1803; d. 18th June, 1864), heir to the estates of his maternal grandfather William Smith; the "Wallace" of his country, who, on the 19th Sept., 1832, m. Lucy-Caroline (d. 12th June, 1861), eldest dau. of Joseph Gabbett, Esq., of Limerick, and, besides a daughter Charlotte-Grace (living in 1887), the good and philanthropic Miss C.G. O'Brien, of Emigration fame in Ireland, had Edward-William, J.P., (b. 23rd Jan., 1837, and living in 1887), of Cahirmoyle, co. Limerick. William Smith O'Brien d. in Wales, but his remains were brought to Ireland and interred at Rathronan, co. Limerick. III. Edward. IV. Robert. V. Henry. Sir Edward's daughters were: I. Granna (or Grace). II. Anne. III. Harriet. IV. Catherine. V. Leney.
131	Sir Lucius, of Dromoland, the fifth Baronet, and thirteenth Baron of Inchiquin: son of Sir Edward; b. 1800, d. 1872; m. twice: first, Mary, dau. of William Fitzgerald, Esq., of Adelphi, co. Clare, by whom he had one son and three daughters: I. Edward-Donogh, of whom presently. I. Juliana-Cecilia, b. 1839. II. Charlotte-Anne, b. 1840. III. Mary-Grace, b. 1848. Sir Lucius was secondly m. (on 25th Oct., 1854) to Louisa, dau. of James Finucane, Esq.
132	Edward Donogh O'Brien, of Dromoland, the sixth Baronet, and the fourteenth "Baron Inchiquin": son of Sir Lucius; b. 1837; living in 1887.