ROBERT MOLESWORTH MOLESWORTH, 1ST VISCOUNT (1656-1725), came of an old Northamptonshire family. His father Robert (d. 1656)1656) was a Cromwellian who made a fortune in Dublin, and he himself supported William of Orange and in 1695 became a prominent member of the Irish privy council. In 1716 he was created a viscount. He was succeeded by his two sons, John, 2nd viscount (1679-1726), and Richard 3rd viscount (1680-1758), the latter of whom saved Marlborough's life at the battle of Ramillies and rose to be a field-marshal. The 3rd viscount's son Richard Nassau (1748-1793) succeeded to the title, which has descended accordingly.
A great-grandson of the 1st viscount, JOHN EDWARD NASSAU