| Dates of Existence | 1784-1860 |
| Surname | Pierrepont |
| Forenames | Mary Laetitia |
| Title | Countess Manvers |
| Epithet | née Eyre; eldest dau. of Anthony Hardolph Eyre of Grove, Nottinghamshire; m 2nd Earl Manvers 1804 |
| Code | NA9487 |
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