Tracing Douglas family roots - unraveling history, one generation at a time.

| Name | Henry (8th Earl of Thomond) O'brien | |
| Birth | 14 Aug 1688 | |
| Gender | Male | |
| Death | 20 Apr 1741 | |
| Person ID | I148158 | First tree |
| Last Modified | 13 Mar 2026 | |
| Father | Henry Horatio Lord O'brien, b. 1670 d. Yes, date unknown | |
| Mother | Henrietta (of Beaufort) Somerset, b. 1669 d. 2 Aug 1715 (Age 46 years) | |
| Marriage | 24 Jun 1686 | |
| Family ID | F24243 | Group Sheet | Family Chart |
| Family | Elizabeth (of Somerset) Seymour, b. 1685 d. 2 Apr 1734 (Age 49 years) | |
| Marriage | 14 Jun 1707 | Isleworth, Middlesex |
| Family ID | F24244 | Group Sheet | Family Chart |
| Last Modified | 24 Jan 2013 | |
| Sources |
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