Name
- Lushington, Henry, DD2
- MacDonnell, Alastair Ruadh, spy, pseud 'Pickle', c 1725-17612
- Mackenzie, George, alias Mackenzie-Quin; formerly Secretary to the English Embassy to Poland2
- Manners, Frances, wife of John, Marquis of Granby2
- Martin, Samuel, MP for Camelford; Secretary to the Treasury2
- Meer, Frans van der, Netherlands Ambassador to Spain2
- Michell, Prussian Minister in England; of Add MS 327292
- Michell, William, Cashier of the Salt Office2
- Montagu, John, 2nd Duke of Montagu2
- Montagu, Robert, 3rd Duke of Manchester2
- Moodie, Benjamin, Lieutenant2
- Moore, Thomas, DD, Incumbent of Chislehurst2
- Morris, Corbyn, Sec of Customs in Scotland2
- Mounsher, John, Alderman of Portsmouth2
- Murray, James, General Governor of Quebec and Minorca2
- Nassau de Zuylestein, William Henry, 4th Earl of Rochford2
- Neat, Joseph, alias Neate; Minister, of Lewes2
- Nevill, William, 14th Baron Abergavenny2
- Nugent, Robert, Viscount Clare (1766) and (1776) Earl Nugent2
- O'Hara, James, 2nd Baron Tyrawley2