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Sir Henry Sidney (20 July 1529 – 5 May 1586), Lord Deputy of Ireland, was the eldest son of Sir William Sidney of Penshurst, a prominent politician and courtier during the reigns of Henry VIII and Edward VI, from both of whom he received extensive grants of land, including the manor of Penshurst in Kent, which became the principal residence of the family.Henry Sidney was brought up at court as the companion of Prince Edward, afterwards King Edward VI, and he continued to enjoy the favour of the Crown, serving under Mary I of England and then, particularly, throughout the reign of Queen Elizabeth I. He was instrumental in the Elizabethan conquest of Ireland, serving as Lord Deputy three times. His career was controversial both at home and in Ireland.