Berkeley, John, 1st Baron Berkeley of Stratton, 1602-78, English army officer and courtier. A royalist, he fought in numerous engagements in the English civil war and later, through association with the duke of York (later James II), won great political advancement. Raised to the peerage in 1658, he was appointed lord president of Connacht for life in 1661 and one of the proprietors of New Jersey in 1664. From 1670 to 1672 he was lord lieutenant of Ireland.