created Baron Mountjoy in the Irish peerage (1617), baron Mountjoy of Thurveston in the English peerage (1627) and Earl of Newport (1628) was appointed master of ordnance to Charles I of England (1634) and played an ambiguous part in the early years of the English Civil War. When the Civil War broke out, however, Newport served in the royalist army, and took part in the second battle of Newbury in 1644. In January 1646 he was taken prisoner and confined in London on parole. He died at Oxford, where he had gone to avoid the plague, leaving three surviving sons, all said to be "idiots" (i.e. mentally disabled).
