'OBrien03'Index links to: Lead / Letter
Families covered: O'Brien of Clare, O'Brien Earls of Thomond

                               
Donough O'Brien, 2nd Earl of Thomond (d 1553)
m. (1533) Ellen Butler (dau of Piers Butler, 8th Earl of Ormonde)
1. Connor O'Brien, 3rd Earl of Thomond
  m1. Joan FitzMaurice (dau of Sir Thomas FitzMaurice, 16th Lord of Kerry)
  A. daughter (d young)
  m2. Una or Wonafrit or Ownye O'Brien (dau of Turlough O'Brien of Arra)
B. Donough O'Brien, 4th Earl of Thomond (d 05.09.1624)
  m1. Ellen Roche (dau of Maurice Roche, Viscount of Fermoy)
  i. Margaret O'Brien
  m. (c1590) Charles McCarthy, 1st Viscount Muskerry
  m2. (1585) Elizabeth FitzGerald (d 12.01.1617, dau of Gerald 'the Wizard' FitzGerald, 11th Earl of Kildare)
  ii. Henry O'Brien, 5th Earl of Thomond (d 1639)
  m. (13.07.1608) Mary Brereton (dau of Sir William Brereton, 1st Lord of Leghlin)
  a. Mary O'Brien (bur 31.05.1686)
  m1. (24.06.1627) Charles Cockayne, 1st Viscount Cullen (b 04.07.1602, bur 19.06.1661)
  m2. George Blount of Mawley Hall (d 20.05.1702)
b. Margaret O'Brien (d 26.07.1681)
  m. (1639, sps) Edward Somerset, 2nd Marquess of Worcester, 'Earl of Glamorgan' (d 03.04.1667)
  c. Elizabeth O'Brien (d after 04.1656)
  m1. Dutton Gerard, 3rd Lord of Gerard's Bromley (b 04.03.1613, d 22.04.1640)
  m2. Philip Wenman, 3rd Viscount of Tuam (b 17.10.1610, d 29.04.1686)
  d. Anne O'Brien (d 1645)
  m. (1641) Henry O'Brien, 7th Earl of Thomond (d 05.1691) @@ just below
  e. Honora O'Brien
  m1. (02.03.1656/7) Sir Francis Englefield, 3rd Bart of Wotton Basset (dsp 05.1665)
m2. Hon. Sir Robert Howard
  iii. Sir Bryan/Barnaby O'Brien, 6th Earl of Thomond (b c1590, bur 15.11.1657)
  m. Mary Fermer (dau of Sir James Fermer)
  a. Henry O'Brien, 7th Earl of Thomond (b c1620, d 02.05.1691)
  m1. (1641) Anne O'Brien (d 1645, dau of Henry O'Brien, 5th Earl of Desmond) @@ just above
  (1) Henry O'Brien, Lord Ibrackan (dvp 01.12.1678)
  m. (1664) Catherine Stuart, Baroness Clifton of Leighton Bromswold (d 11.1702, dau of George Stuart, seigneur d'Aubigny)
  (A) Donough O'Brien, Lord Ibrackan (dsp)
  m. Sophia Osborne (dau of Thomas Osborne, Duke of Leeds)
  (B) George O'Brien (d young)
  (C) Mary O'Brien
  m. John FitzGerald, Earl of Kildare (18th ??)
(D) Catherine O'Brien, later Baroness Clifton (b 29.01.1673, d 11.08.1706
  m. (10.07.1688) Edward Hyde, 3rd Earl of Clarendon (b 28.11.1661, d 31.03.1723)
  m2. (1660) Sarah Russell (b 1639, bur 16.11.1715, dau of Sir Francis Russell of Chippenham)
  (2) Henry Horatio O'Brien, Lord Ibrackan (dvp aged 21)
  m. (1686) Henrietta Somerset (d 1715, dau of Henry Somerset, Duke of Beaufort)
  (A) Henry O'Brien, 8th Earl of Thomond, Viscount Tadcaster (b 14.08.1688, dsp 20.04.1741)
  m. (04.06.1707) Elizabeth Seymour (d 02.04.1734, dau of Charles Seymour, Duke of Somerset)
  (3) Elizabeth O'Brien (d unm 03.06.1688)
  (4) Auberie Anne Penelope O'Brien (d 02.12.1703
  m. (06.08.1691) Henry Howard, 6th Earl of Suffolk, 1st Earl of Bindon (b 1670, d 19.09.1718)
  (5) Mary O'Brien (d 09.11.1735)
  m. Sir Matthew Dudley, Bart of Clopton
b. Penelope O'Brien (b c1623, d 18.04.1702)
  m. (1644-5) Henry Mordaunt, 2nd Earl of Peterborough (bpt 18.10.1623, d 19.06.1697)
  C. Teige O'Brien of Dromore
  m1. Slany McMurrough O'Brien (dau of Teige McMurrough O'Brien of Smithstown)
  m2. Joan O'Shaughnessy (dau of Sir Dermod O'Shaughnessy)
i.+ issue (dsp) - Dermod, Mortaugh
  D. Sir Daniel O'Brien of Carriggy Chouly, 1st Viscount of Clare (b by 1582, d c1666)
  m. Catherine FitzThomas (dau of Gerald FitzMaurice, Earl of Desmond, by Eleanor Butler)
  i. Donough O'Brien (dsp 06.08.1638)
  m. Elizabeth Southwell (dau of Sir Thomas Southwell)
  ii. Connor O'Brien, 2nd Viscount of Clare (b c1605, d c1670)
  m. Honora O'Brien (dau of Daniel O'Brien of Duagh by Ellen, dau of Edmund FitzGerald Knight of Glyn)
  a. Daniel O'Brien, 3rd Viscount of Clare (d 1690-1)
  m. Philadelphia Lennard (dau of Francis Lennard, Lord Dacre)
  (1) Daniel O'Brien, 4th Viscount of Clare (dsp)
  (2) Charles O'Brien, 5th Viscount of Clare (d Ramilles 11/23.05.1706)
  m. (09.01.1696/7) Charlotte Bulkeley (dau of Henry Bulkeley or Buckley (son of Thomas, 1st Viscount) by Sophia Stuart, m2. Daniel Mahoney)
  (A) Charles O'Brien, 6th Viscount of Clare (b 1699, d 09.09.1761)
Charles, known in the French service as Marquess Thomond, would have inherited the Earldom of Thomond had not his grandfather, the 3rd Viscount, been attainted for fighting for King James VII/II at the battle of the Boyne.
  m. (1755) Marie Genevive Gauthierde Chiffreville, Marchioness de Chiffreville
  (i) Charles O'Brien, 7th Viscount of Clare (b 1756, d unm 1764)
  (ii) Antoinette Charlotte Marie Septimanie O'Brien
  m. Duc de Choiseuil-Praslin
  b. Margaret O'Brien
  m. Hugh O'Reilly
  c. Ellen O'Brien
  m. Sir Roger O'Shaghnessy
  d. Honora O'Brien
  m. Sir John FitzGerald of Kerry
  e. Catherine O'Brien
  m1. Gerret FitzGerald of Castleishen
  m2. John Macnamara
  f. Sarah O'Brien
  m. Daniel O'Sullivan Bear
  g. Mary O'Brien
  m. _ Power of Doonil
  iii. Murrough O'Brien (dsp)
  m. Eleanor Wingfield (dau of Richard Wingfield)
  iv. Teigue O'Brien
  m. Honora FitzGerald (dau of Gerald FitzGerald of Ballyglagiane)
  a. Donough O'Brien (a 1694)
  E. Hugh O'Brien
  i. ?? O'Brien
  a. Conor O'Brien (dsp)
Considering the alternatives noted above, Hugh was probably the most likely father of the following Turlough (who may have been the same person noted above as father of Conor who dsp) who is identified in BP1934 (Bellew) as grandson of Connor, 3rd Earl.
  ii. Turlough O'Brien
  a. Winifred O'Brien
  m. _ Creagh of Bearnagihy (Colonel)
  (1) Mary Creagh
  m. Richard Bellew (b c1697, d 06.04.1792)
  F. Mary O'Brien
  m. Terlaugh Roe MacMahon, Lord of East Corcavaskin
G. Margaret O'Brien (d 20.02.1636)
  m. James Butler, 2nd Lord of Dunboyne (d 18.02.1624)
  H. Honora O'Brien (d 1600)
  m. Thomas FitzMaurice, 18th Lord of Kerry (d 03.06.1630)
2. Margaret O'Brien (d 1568)
  Unless Margaret was divorced, one of dates shown here must be wrong but both TCP (Clanricarde) and TCP (Inchiquin) identify her and both her parents quite clearly albeit without either mentioning the other marriage, which is unusual.
  m1. (before 1550) Dermod O'Brien, 2nd Lord of Inchiquin (d 01.05.1557)
  m2. (24.11.1553) Richard Bourke, 2nd Earl of Clanricarde (d 24.07.1582)
3. More/Maud O'Brien
  m. Teige Macnamarareagh
4. Mary O'Brien
  m. Theobald Bourke, younger of Castle Connell (dvp 19.08.1578)

Main source(s): BE1883 (O'Brien of Thomond), BE1883 (O'Brien of Clare)
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