Family: Walter Blackett Trevelyan / Helena Caroline Trevelyan (F530)
m. 1849 | Raleigh Trevelyan (1781-1865) 
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 | Elizabeth Grey ( -1885)
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| Thornton Raleigh Trevelyan ( -1845)  |
| Elizabeth Young Trevelyan ( -1830) |
| Raleigh Trevelyan (1823- ) |
| Sir John Trevelyan, 5th Baronet (1761-1846)
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| Maria Wilson (1772-1851)
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| John Wilson Trevelyan (1794- ) |
| George Thomas Trevelyan (1795- ) |
| Maria Jane Trevelyan (1796- ) |
| Sir Walter Calverley Trevelyan, 6th Baronet (1797-1879) |
| Julia Trevelyan (1798- ) |
| Raleigh Trevelyan (1800-1814) |
| Emma Trevelyan (1801-1857) |
| Arthur Trevelyan (1802- ) |
| Edward Spencer Trevelyan (1805-1854) |
| Alfred Wilson Trevelyan (1807-1830) |
| Beatrice Trevelyan (1809-1898) |
| Laura Agnes Trevelyan (1811-1899) |
| Walter Blackett Trevelyan (1821-1894)
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| Helena Caroline Trevelyan (1815-1898)
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| Herbert Trevelyan (1847-1912) |
| Constance Helena Trevelyan (1851- ) |
| Walter Blackett Trevelyan (1852-1920) |
| Willoughby Fenwick Trevelyan (1856-1919) |