Sir Dermot Ó Seachnasaigh,

Chief of the Name The Chief of the Name, or in older English usage Captain of his Nation, is the recognised head of a family or clan ( Irish and Scottish Gaelic: ''fine'') in Ireland and Scotland. Ireland There are instances where Norman lords of the time like ...

, died 1606. He was a son of Sir

Ruaidhrí Gilla Dubh Ó Seachnasaigh Sir Roger O'Shaughnessy ( Irish: ''Ruaidhrí Gilla Dubh Ó Seachnasaigh'') (died 1569) was an Irish Knight and Chief of the Name. The son of Sir Diarmaid Ó Seachnasaigh, Ruaidhrí was described by Sir Henry Sidney as "a very obedient and ci ...

and Lady Honora O'Brien, daughter of

Murrough O'Brien, 1st Earl of Thomond Murrough O'Brien, 1st Baron of Inchiquin, 1st Earl of Thomond () (died 7 November 1551) was an Irish peer, Chief of Clan O'Brien, and the last King of Thomond. Biography Murrough was a lineal descendant of Brian Boru, High King of Ireland, and ...

. Ó Seachnasaigh was in contention with his elder but illegitimate brother, John Ó Seachnasaigh, who till 1585 claimed lordship of Cenél Áeda. The two brothers travelled to

Dublin Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...

to attend the 1585 Parliament, after which no more is heard of John until 1601. Sir Dermot married Shyly Ni Hubert, and had issue Roger Gilla Dubh (born 1583), Dathi, William, Joan, Julia and Honora. * William had sons William, Edmond, Roger and Dermot. * Joan married Sir William Burke, and was the mother of

Richard Burke, 6th Earl of Clanricarde Richard Burke, 6th Earl of Clanricarde ( ; died August 1666) was an Irish peer. Career Richard was the eldest son of Sir William Burke and Joan O'Shaughnessy. He was a first cousin to the previous Earl and had served under him in the royalis ...

. * Julia married Teige O'Kelly of Gallagh. * Honora married Johnock Burke of Tully.

References

* D'Alton, John
Illustrations, Historical and Genealogical, of King James's Irish Army List (1689)
Dublin: 1st edition (single volume), 1855. pp. 328–32. * ''History of Galway'',

James Hardiman James Hardiman (February 1782 – 13 November 1855), also known as Séamus Ó hArgadáin, was a librarian at Queen's College, Galway and an important historian. Hardiman is best remembered for his '' History of the Town and County of Galway'' (1 ...

, 1820 * ''Tabular pedigrees of O'Shaughnessy of Gort'' (1543–1783), Martin J. Blake, Journal of the

Galway Archaeological and Historical Society The Galway Archaeological and Historical Society was founded on 21 March 1900. It promotes historical preservation, as well as the study of the archaeology and history of the west of Ireland. As of January 2002, the Society had published 53 cons ...

, vi (1909–10), p. 64; vii (1911–12), p. 53. *

John O'Donovan John O'Donovan may refer to: *John O'Donovan (scholar) (1806–1861), Irish language scholar and place-name expert *John O'Donovan (politician) (1908–1982), Irish TD and Senator *John O'Donovan (police commissioner) (1858–1927), New Zealand pol ...

The Genealogies, Tribes, and Customs of Hy-Fiachrach
Dublin: Irish Archaeological Society. 1844. Pedigree of O'Shaughnessy: pp. 372–91. * ''Old Galway,'' Professor Mary Donovan O'Sullivan, 1942 * ''Galway: Town and Gown,'' edited Moran et al., 1984 * ''Galway: History and Society'', 1996 {{DEFAULTSORT:O Seachnasaigh, Dermot Nobility from County Galway Dermot 16th-century Irish people 17th-century Irish people