Lionel Sackville, 1st Duke of Dorset

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Lionel Cranfield Sackville, 1st Duke of Dorset, PC (January 18, 1688 – October 10, 1765) was an English political leader and Lord Lieutenant of Ireland. He was the son of the 6th Earl of Dorset and 1st Earl of Middlesex and the former Lady Mary Compton, younger daughter of the 3rd Earl of Northampton. Styled Lord Buckhurst from birth, he succeeded his father as 7th Earl of Dorset and 2nd Earl of Middlesex in 1706, and was created Duke of Dorset in 1720.

He married Elizabeth Colyear, the daughter of Lieutenant-General Walter Colyear (brother of the 1st Earl of Portmore), in January 1709. Their sons were:

• Charles, Earl of Middlesex (later 2nd Duke of Dorset)
• Lord John Sackville (father of the 3rd Duke of Dorset)
• Lord George Sackville (later Lord George Germain and 1st Viscount Sackville)

Dorset served twice as Lord Lieutenant of Ireland, from 1731 to 1737 and again from 1751 to 1755. In 1739, at the foundation of the Foundling Hospital, he was one of that charity's original governors.

Political offices
Preceded by The Duke of Cumberland	Lord Warden of the Cinque Ports 1708–1712	Succeeded by The Duke of Ormonde
Preceded by The Duchess of Somerset	Groom of the Stole 1714–1719	Succeeded by The Earl of Sunderland
Preceded by The Duke of Argyll	Lord Steward 1725–1730	Succeeded by The Earl of Chesterfield
Preceded by The Lord King	Lord High Steward 1727	Succeeded by The Lord Hardwicke
Preceded by The Earl of Leicester	Lord Warden of the Cinque Ports 1727–1765	Succeeded by The Earl of Holdernesse
Preceded by The Lord Carteret	Lord Lieutenant of Ireland 1730–1737	Succeeded by The Duke of Devonshire
Preceded by The Duke of Devonshire	Lord Steward 1737–1744	Succeeded by The Duke of Devonshire
Preceded by The Earl of Harrington	Lord President of the Council 1745–1751	Succeeded by The Earl Granville
Preceded by The Earl of Harrington	Lord Lieutenant of Ireland 1750–1755	Succeeded by Marquess of Hartington
Preceded by Marquess of Hartington	Master of the Horse 1755–1757	Succeeded by The Earl Gower
Honorary titles
Preceded by The Earl of Rockingham	Lord Lieutenant of Kent 1746–1765	Succeeded by The Duke of Dorset
Preceded by The Earl of Rockingham	Custos Rotulorum of Kent 1724–1765
Peerage of England
New title	Duke of Dorset 1720–1765	Succeeded by Charles Sackville
Preceded by Charles Sackville	Earl of Dorset 1706–1765