Name
- Aerssen, Cornelis, Heer van Sommelsdijk3
- Baron, Hartgill, Clerk of the Privy Seal, fl 16603
- Boyle, Richard, Viscount Dungarvin, afterwards 2nd Earl of Cork3
- Boyle, Roger, Baron Broghill, 1st Earl of Orrery3
- Butler, Elizabeth, wife of James, Duke of Ormonde3
- Davis, Paul, Knight, clerk of the privy council and secretary of state in Ireland, c 1600-16723
- Digby, George, 2nd Earl of Bristol, politician, 1612-16773
- Durham, Alexander, army officer and cyphered correspondent of Sir Edward Nicholas, fl 1654-16553
- Elliott, John, of Egerton MS 25373
- Hamilton, William, Captain; of Loughcurrin3
- Harbord, Charles, Surveyor-General3
- Harby, Job, 1st Baronet, Farmer of the Customs3
- Hume, Alexander, Chamberlain to the Princess of Orange3
- James II, Duke of Brunswick-Lüneburg3
- Jermyn, Henry, Baron Jermyn (1643), Earl of St. Albans (1660)3
- La Rochelle, France3
- Lane, Richard, Lord Keeper3
- Livingston, James, 1st Viscount Newburgh3
- Massey, Edward, Major General pseudonyms: Tristram Thomas and 'Mr Minden'; cypher'866'3
- Monck, George, 1st Duke of Albemarle, army officer, 1608-16703