World of HYDE
Discovering our Ancestors and their descendants to all parts of the world. Last updated 15th March 2026.
Family: Henry O'Brien / Mary Brereton (F66686)
m. 13 Jul 1600
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 | Donogh O'Brien, 4th Earl Of Thomond (1560-1624)
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 | Elisabeth Fitzgerald (1560-1617)
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| Lady Sarah O'Brien (1585-1644)  |
| Brian Barnabas Macdonnchadha O'Brien (1590-1657) |
| Teige O'Brien (1594- ) |
| Lord of Leighlin Lord William Brereton, II (1550-1631)
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| Margaret Savage (1549-1597)
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| Mary Brereton (1580-1640)
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| Henry O'Brien (1588-1639)
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| Mary O'Brien Blount (1600-1686) |
| Margaret O'Brien (1606-1681) |
| Lady Elizabeth O'Brien (1610-1658) |
| Lady Anne O'Brien, Countess of Thomond (1619-1645) |
| Honora O'Brien (1630- ) |