Biography
Louisa Thynne was born 25 March 1801 to Thomas Thynne, 2nd Marquess of Bath (1765-1837) and Isabella Elizabeth Byng (1773-1830) and died 7 November 1859 of unspecified causes. She married Henry Lascelles, 3rd Earl of Harewood (1797-1857) 5 July 1823 .
Children
| Name | Birth | Death | Joined with |
| Henry Thynne Lascelles, 4th Earl of Harewood (1824-1892) | 18 June 1824 | 24 June 1892 Harewood House, Yorkshire, England, United Kingdom | Elizabeth Joanna de Burgh (1826-1854) Diana Elizabeth Smyth (1838-1904) |
| Egrement William Lascelles (1825-1892) | |||
| George Edwin Lascelles (1826-1911) | |||
| Algernon Francis Lascelles (1828-1845) | |||
| Alfred Daniel Lascelles (1829-1845) | |||
| Louisa Isabella Lascelles (1830-1918) | |||
| James Walter Lascelles (1831-1901) | 14 November 1831 Harewood, Yorkshire, England, United Kingdom | 25 November 1901 | Emma Clara Miles (1830-1911) |
| Susan Charlotte Lascelles (1834-1927) | |||
| Horace Douglas Lascelles (1835-1869) | |||
| Blanche Emma Lascelles (1837-1863) | 18 August 1837 Harewood, Yorkshire, England, United Kingdom | 26 December 1863 Mayfair, London, England, United Kingdom | Henry Bentinck Boyle, 5th Earl of Shannon (1833-1890) |
| Florence Harriet Lascelles (1838-1901) | |||
| Mary Elizabeth Lascelles (1842-1866) | |||
| Maud Caroline Lascelles (1846-1938) | 26 November 1846 Harewood, Yorkshire, England, United Kingdom | 14 April 1938 | George Francis Hamilton (1845-1927) |
Footnotes (including sources)
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