Lionel Sackville, 1st Duke of Dorset

Lionel Cranfield Sackville, 1st Duke of Dorset, PC (18 January 1688 - 10 October 1765) was an English politician and Lord Lieutenant of Ireland.
Dorset was Lord Lieutenant of Ireland twice. First from 1731 to 1737 and then again from 1751 to 1755.