His father entered the service of William III of England .
His father was created Duke of Leinster and Earl of Bangor in 1691 , before succeeding as 3rd Duke of Schomberg and Marquess of Harwich in 1693 .
His father entered the service of William III of England and was created Duke of Leinster and Earl of Bangor in 1691 , before succeeding as 3rd Duke of Schomberg and Marquess of Harwich in 1693 .