Name
- Massey, Edward, Major General pseudonyms: Tristram Thomas and 'Mr Minden'; cypher'866'1
- Maxwell, Alexander, of Egerton MS 25421
- Maynard, John, of Egerton MS 25421
- Mazarin, Giulio, Cardinal 16411
- Meade, Robert, Royalist agent to Sweden1
- Mervyn, Audley, Speaker of the Irish Parliament1
- Merydale, Richard1
- Middleton, John, 1st Earl of Middleton, High Commissioner to the Scotch Parliament, afterwards Governor of Tangier1
- Monck, George, 1st Duke of Albemarle, army officer, 1608-16701
- Montagu, Edward, Admiral, 1st Earl of Sandwich (1660)1
- Morgan, William, of Egerton MS 25421
- Morland, Samuel, 1st Baronet, diplomatist and mathematician1
- Morley, George, Bishop of Winchester1
- Mossom, Robert, DD1
- Narbrough, John, Knight, naval officer, d 16881
- Neale, Paul1
- Nelson, of Egerton MS 25421
- Nicholas, Edward, grandson of Secretary Nicholas, Treasurer to Queen Mary, etc1
- Nicholas, Matthew, pseudonym: John Durdo, Dean of Bristol, and of St. Paul's1
- Nightingale, Thomas, of Egerton MS 25421