George FitzRoy, 1st Duke of Northumberland
LieutenantGeneral George FitzRoy, 1st Duke of Northumberland, KG, PC was the third and youngest illegitimate son of King Charles II of England his mother was Barbara Villiers, Countess of Castlemaine . OnOctober 1674, he was created Earl of Northumberland, Baron of Pontefract and Viscount Falmouth . OnApril 1683, he was created Duke of Northumberland.
The first Duke of Northumberland was born at Merton College, Oxford. In 1682, he was employed on secret service in Venice. Upon his return to England in 1684, he was elected and installed Knight of the Garter. That summer, he served as a volunteer on the side of the French at the Siege of Luxembourg. In 1687, Northumberland commanded the 2nd Troop of Horse Guards. A year later, he was appointed a lord of His Majestys bedchamber. In 1701, he was appointed Constable of Windsor Castle, in 1710 Lord Lieutenant of Surrey, and in 1712, he became Lord Lieutenant of Berkshire as well. In 1703, he succeeded the Earl of Oxford as Colonel of the Royal Regiment of Horse. Seven years later, onJanuary 1710, he became LieutenantGeneral. OnApril 1713, he was sworn into the Privy Council and as Chief Butler of England.
Source: Wikipedia