YourRoots by Genomelink
Sign up free
banner

Sign up to explore more

Create a free account to navigate family trees, view ancestors, and discover connections.

Sign up free

Anne O'Brien Countess 1621–1645 – Genealogical Records

Birth Date: 1621

Birth Location: Thomond, County Clare, Connaught, Ireland

Death Date: 1 September 1645

Death Location: Great Billing, Northamptonshire, England, United Kingdom

Father: Henry Thomond

Mother: Lady Fermor

Spouse(s): Henry Seymour

Children(s): Lady MacDonald, Lord O'Brien, Lady O'Brien, Lord O'Brien

In 1621, Anne O'Brien Countess entered the world in Thomond, County Clare, Connaught, Ireland, born to Henry Macdonnchadha O Brien Earl Van Thomond And Lady Mary Fermor. Anne O'Brien Countess married Henry Eliz O Brien Earl Of Thomond Baron Of Ibrican In Ireland Viscount Tadcaster Seymour, and had children including Elizabeth Obrien, Lady Auberie Anne Penelope O Brien, Lady Aubery Anne Penelope O Brien Macdonald, Lord Henry Horatio O Brien, Lord Henry O Brien Lord Ibrackan Lord O Brien, Mary Ann O Brien. Anne O'Brien Countess passed away in 1645 in Great Billing, Northamptonshire, England, United Kingdom.

Find more search results for Anne Countess
AC

Reliability Score

This score reflects the reliability of the source family tree. A high rating indicates a trustworthy source with strong data consistency.

Reliability Score:
B
Criteria:
  • A 3 criteria (Strong)
  • B 2 criteria (Medium)
  • C 1 criteria (Basic)
  • N/A 0 criteria (Insufficient)

This tree's reliability score:

  • Record available
  • Descendant's record available
  • Star tree owner

Biography

  • In 1621, Anne O'Brien Countess entered the world in Thomond, County Clare, Connaught, Ireland, born to Henry Macdonnchadha O Brien Earl Van Thomond And Lady Mary Fermor.
  • Anne O'Brien Countess married Henry Eliz O Brien Earl Of Thomond Baron Of Ibrican In Ireland Viscount Tadcaster Seymour, and had children including Elizabeth Obrien, Lady Auberie Anne Penelope O Brien, Lady Aubery Anne Penelope O Brien Macdonald, Lord Henry Horatio O Brien, Lord Henry O Brien Lord Ibrackan Lord O Brien, Mary Ann O Brien.
  • Anne O'Brien Countess passed away in 1645 in Great Billing, Northamptonshire, England, United Kingdom.

Immediate Family

Parents

Spouses(s)

Children(s)

Anne Countess's Ancestors

Self
Anne Countess
1621–1645
Birth Place: Thomond, County Clare, Connaught, Ireland
Parents
Henry Macdonnchadha O'Brien Earl, van Thomond
1588–1639
Thomond, County Clare, Connaught, Ireland
Lady (Mary) Fermor
1591–1675
Easton Neston, Northamptonshire, England
Grandparents
Donogh (Cairbrech O'Brien 6th Earl of Thomond,Baron of) Ibrickan
1550–1624
Cork, Cork, Ireland
Elisabeth (Eveleen) FitzGerald
1560–1617
London, Middlesex, Co, England
Sir (George) Fermor
1544–1612
Easton Neston, Northamptonshire, England, United Kingdom
Lady (Mary\ Maria) Curzon
1550–1628
Addington, Buckinghamshire, England
Great-Grandparents
Connor Thomond
1534–1581
Una Brien
1533–1589
Gerald Kildare
–1597
Mabel Kildare
1532–1610
Sir (Knight)
1517–1571
Lady Hunstanton
1513–1569
Sir Waterperry
1520–1572
Lady Hussey
1525–1583
2nd-Great-Grandparents
Turlogh O'Brien
1510–1601
More O'Carroll
1510–1592
Sir Kildare
1487–1534
Lady Grey,
1497–1548
Sir Fermor
1490–1552
Dame Brown
1495–1587
Nicholas Vaux
1460–1523
Elizabeth Fitzhugh
1459–1513
Elizabeth Madresfield
1508–1590
John Sir
1505–1527
Joan Lady
1505–1595

Anne Countess's Descendants

1.
AC
Anne (O'Brien) Countess (1621–1 September 1645) m. Henry (Eliz. O'Brien, Earl of Thomond, Baron of Ibrican in Ireland, Viscount Tadcaster) Seymour (1618–2 May 1691)
  1. 1. Lady (Aubery Anne Penelope O'Brien) MacDonald 1640–1702 m. Henry (Mordaunt 2nd EARL of) PETERBOROUGH 1621–1697
    1. 1. Mary Mordaunt 1650–1721 m. Bryan (O'Cahan) (Keane) 1650–1714
      1. 1. Robert (Keane) (O'Cahan) 1675–1756 m. Anne (Creagh) Creighe 1681–1769
        1. 1. Charles Keane 1695–1738 m. Ellen Neylon 1700–1731
        2. 2. Thomas Keane 1700–
        3. 3. Eugene ((Owen)) Keane 1701–
        4. 4. Anne ('Ruadh') Keane 1703–1803
        5. 5. Margaret Keane 1704–1805
        6. 6. Richard Keane 1702–
      2. 2. Daniel O'Cahan 1675–
      3. 3. Brian O'Cahan 1675–
      4. 4. Andrew O'Cahan 1687–1755
      5. 5. Nicholas O'Cahan 1685–1745
      6. 6. Charles O'Cahan 1673–1706
      7. 7. Eugene (Owen) O'Cahan 1671–1693
    2. 2. Henry Howard 1695–
    3. 3. Elizabeth Mordaunt 1653–1676
    4. 4. HER (GRACE Mary Mordaunt 7th BARONESS Mordaunt, DUCHESS of) NORFOLK 1660–1705
  2. 2. Lord (Henry O'Brien, Lord Ibrackan, Lord) O'Brien 1638–1678
  3. 3. Lady (Auberie "Anne" Penelope) O'Brien 1640–1702
  4. 4. Lord (Henry Horatio) O'Brien 1642–1678

Anne Countess's Timeline

2 Records

1621
1621
Birth of Anne O'Brien Countess in Thomond, County Clare, Connaught, Ireland
Thomond, County Clare, Connaught, Ireland
1645
1 September 1645
Age 24
Death of Anne O'Brien Countess in Great Billing, Northamptonshire, England, United Kingdom
Great Billing, Northamptonshire, England, United Kingdom

Sources

    Genealogy Event 1
    Event Type: Birth
    Event Date: 1621
    Event Place: Thomond, County Clare, Connaught, Ireland

    Genealogy Event 2
    Event Type: Death
    Event Date: 1 September 1645
    Event Place: Great Billing, Northamptonshire, England, United Kingdom

About YourRoots

Family Tree Map

Explore your family tree geographically

Import your GEDCOM file to transform your family tree into an interactive global map. See your roots laid out visually and understand your true geographic heritage.

Powerful tools like "Trace Back To Me" instantly map your family's migration paths from a chosen ancestor all the way back to you.

LEARN MORE
AI Genealogy Research

Discover ancestors beyond "end-of-line" automatically

Import your family tree and let AI expand it for you. AI Ancestor Finder scans "end-of-line" ancestors to uncover their parents across hundreds of family lines at once. AI Deep Research analyzes selected ancestors and family clusters, suggesting relevant records and next steps.

Turn on Auto Research Mode to get new discoveries daily or weekly, so your tree keeps growing even while you're away.

LEARN MORE
DNA Match

Find more DNA matches across all DNA tests

Combine your DNA data with your family tree to unlock the full power of YourRoots DNA Match. Connect with relatives across major testing services — Ancestry, 23andMe, MyHeritage, and more.

View your matches' maps and trees to identify shared ancestors, and soon you'll be able to add them directly to your own tree and map.

LEARN MORE
Ancestry Reports

Ancestry DNA analysis that goes deeper than others

Unlock exclusive reports that reveal your deeper origins.

  • Deep Ancestry Report — Analyze 130+ ethnicities, sub-regions, and 1,800+ communities in one detailed view.
  • Global & Native American Reports — Developed with Stanford researchers to uncover hidden ancestries across all 22 chromosomes.
  • Ancient DNA Series — Compare your DNA with 1,000+ ancient genomes from Viking, Celtic, and early American civilizations.
LEARN MORE