Diarmaid Ó Seachnasaigh,

Irish Irish may refer to: Common meanings * Someone or something of, from, or related to: ** Ireland, an island situated off the north-western coast of continental Europe ***Éire, Irish language name for the isle ** Northern Ireland, a constituent unit ...

knight A knight is a person granted an honorary title of knighthood by a head of state (including the Pope) or representative for service to the monarch, the church or the country, especially in a military capacity. Knighthood finds origins in the Gr ...

and Chief of the Name, died before 1567. Ó Seachnasaigh was a descendant of

Seachnasach mac Donnchadh Seachnasach mac Donnchadh () was an ancestor to the family of O'Shaughnessy. Seachnasach was a member of the Uí Fiachrach Aidhne dynasty, formerly Kings of Connacht. By the tenth century their power had been reduced to Aidhne, a small kingdom ...

, himself a descendant of the kings of

Uí Fiachrach Aidhne Uí Fhiachrach Aidhne (also known as Hy Fiachrach) was a kingdom located in what is now the south of County Galway. Legendary origins and geography Originally known as Aidhne, it was said to have been settled by the mythical Fir Bolg. Dubhalta ...

. Successive Ó Seachnasaigh's have ruled the district of Cenél Áeda na hEchtge since at least the 13th century. The clan had been vassals of either the

Ó Briain The O'Brien dynasty ( ga, label=Classical Irish, Ua Briain; ga, label=Modern Irish, Ó Briain ; genitive ''Uí Bhriain'' ) is a noble house of Munster, founded in the 10th century by Brian Boru of the Dál gCais (Dalcassians). After becoming ...

Thomond Thomond (Classical Irish: ; Modern Irish: ), also known as the kingdom of Limerick, was a kingdom of Gaelic Ireland, associated geographically with present-day County Clare and County Limerick, as well as parts of County Tipperary around Nena ...

or the

Burke Burke is an Anglo-Norman Irish surname, deriving from the ancient Anglo-Norman and Hiberno-Norman noble dynasty, the House of Burgh. In Ireland, the descendants of William de Burgh (–1206) had the surname ''de Burgh'' which was gaelicised ...

Clanricarde Clanricarde (; ), also known as Mac William Uachtar (Upper Mac William) or the Galway Burkes, were a fully Gaelicised branch of the Hiberno-Norman House of Burgh who were important landowners in Ireland from the 13th to the 20th centuries. T ...

, supremacy depending. For over two hundred years Ireland west of the River Shannon had been beyond the pale of the Anglo-Irish administration based in

Dublin Dublin (; , or ) is the capital and largest city of Ireland. On a bay at the mouth of the River Liffey, it is in the province of Leinster, bordered on the south by the Dublin Mountains, a part of the Wicklow Mountains range. At the 2016 c ...

. From 1533, Henry VIII began integrating them into his realm, knighting Diarmaid Ó Seachnasaigh and representatives of other clans. Henry later evolved this into the policy of

Surrender and regrant During the Tudor conquest of Ireland (c.1540–1603), "surrender and regrant" was the legal mechanism by which Irish clans were to be converted from a power structure rooted in clan and kin loyalties, to a late-feudal system under the English l ...

. Ó Seachnasaigh's submission of 9 June 1543 stated that:

''All the manors, lordshipps, towns and town-lands of Gortynchegory, Dromneyll, Dellyncallan, Ballyhide, Monynean, Ardgossan, Ballyegyn, Kapparell, Clonehaghe, Tollenagan, Lycknegarishe, Crege, Karrynges, Tirrelagh, Rathvilledowne, Ardmylowan, one-third part of Droneskenan and Rath; the
moiety Moiety may refer to: Chemistry * Moiety (chemistry), a part or functional group of a molecule ** Moiety conservation, conservation of a subgroup in a chemical species Anthropology * Moiety (kinship), either of two groups into which a society is ...
of Flyngeston, Ardvillegoghe, Dromleballehue, Cowle, and Beke''

were now to be held by him and his male heirs to the crown. Sir Diarmaid Ó Seachnasaigh married Mór Pheachach Ní Briain. The

Annals of the Four Masters The ''Annals of the Kingdom of Ireland'' ( ga, Annála Ríoghachta Éireann) or the ''Annals of the Four Masters'' (''Annála na gCeithre Máistrí'') are chronicles of Middle Ages, medieval Irish history. The entries span from the Flood myt ...

record her death ''sub anno'' 1569:

''More Phecagh, daughter of Brian, the son of Teige, son of Turlough, son of Brian Catha-an-aenaigh O'Brien, and wife of O'Shaughnessy, i.e. Dermot, the son of William, son of John Boy, a woman distinguished for her beauty and munificence, died.''

Their children were Sir

Ruaidhrí Gilla Dubh Ó Seachnasaigh Ruaidhrí Gilla Dubh Ó Seachnasaigh (died 1569) was an Irish Knight and Chief of the Name. He is known in English as ''Sir Roger O'Shaughnessy''. The son of Sir Diarmaid Ó Seachnasaigh, Ruaidhrí was described by Sir Henry Sidney as "a ve ...

and

Diarmaid Riabach Ó Seachnasaigh Diarmaid Riabach Ó Seachnasaigh, Chief of the Name, died 1579. Annalistic references * ''M1573.6. Murrough, the son of Dermot, son of Murrough O'Brien, was slain by Ulick Burke, the son of Rickard, who was son of Ulick-na-gCeann, and O'Shau ...

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 (1782–1855), also known as Séamus Ó hArgadáin, was a librarian at Queen's College, Galway. Hardiman is best remembered for his '' History of the Town and County of Galway'' (1820) and '' Irish Minstrelsy'' (1831), one of the f ...

, 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, at the Railway Hotel, Galway. It promotes the study of the archaeology and history of the west of Ireland. Since 1900, the Society has published 70 volumes of the ''J ...

, vi (1909–10), p. 64; vii (1911–12), p. 53. * John O'Donovan
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 Mary Josephine Donovan O'Sullivan was Professor of History at Queens College, Galway (now NUI Galway) from 1914 to 1957. Biography One of ten children, four of whom survived infancy, Donovan was born at Fair Hill Road in Galway on 24 November ...

, 1942 * ''Galway: Town and Gown,'' edited Moran et al., 1984 * ''Galway: History and Society'', 1996 {{DEFAULTSORT:O Seachnasaigh, Diarmaid People from County Galway Diarmaid 16th-century Irish people