Algernon Seymour, 7th Duke of Somerset was born 11 November 1684 in Petworth House, Petworth, West Sussex, England, United Kingdom to Charles Seymour, 6th Duke of Somerset (1662-1748) and Elizabeth Percy (1667-1722) and died 7 February 1750 Percy Lodge, Iver, Buckinghamshire, England, United Kingdom of unspecified causes. He married Frances Thynne (1699-1754) 1 March 1714 .
Children
| Name | Birth | Death | Joined with |
| George Seymour (1725-1744) | |||
| Elizabeth Seymour (1716-1776) | 26 November 1716 | 5 December 1776 | Hugh Percy, 1st Duke of Northumberland (1715-1786) |
Siblings
| Name | Birth | Death | Joined with |
| Algernon Seymour, 7th Duke of Somerset (1684-1750) | 11 November 1684 Petworth House, Petworth, West Sussex, England, United Kingdom | 7 February 1750 Percy Lodge, Iver, Buckinghamshire, England, United Kingdom | Frances Thynne (1699-1754) |
| Elizabeth Seymour (1685-1734) | |||
| Anne Seymour (1691-1722) | 28 November 1691 Petworth, Sussex, England, United Kingdom | 27 November 1722 | Peregrine Hyde Osborne, 3rd Duke of Leeds (1691-1731) |
| Catherine Seymour (c1693-1731) | 1693 | 9 April 1731 | William Wyndham (1687-1740) |
Residences
Footnotes (including sources)
| ‡ General |
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| Honorary titles | ||
|---|---|---|
| Preceded by The Earl of Dorset |
Lord Lieutenant of Sussex 1706–1750 |
Vacant Title next held by The Earl of Ashburnham
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| Preceded by The Duke of Kingston-upon-Hull |
Custos Rotulorum of Wiltshire 1726–1750 |
Succeeded by Robert Sawyer Herbert |
| Peerage of England | ||
| Preceded by Charles Seymour |
Duke of Somerset 1748–1750 |
Succeeded by Edward Seymour |
| Earl of Hertford 1748–1750 |
Extinct | |
| Peerage of Great Britain | ||
| New creation | Earl of Northumberland 1749–1750 |
Succeeded by Hugh Percy |
| Earl of Egremont 1749–1750 |
Succeeded by Charles Wyndham | |
| Baron Percy 1722–1750 |
Succeeded by Elizabeth Smithson | |
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