Name
- Newton, Augustus, of Add MS 408801
- Noott, David, of Barnstaple1
- Norcott, Amos Godsill Robert, Major-General; KCH1
- Norris, James, of London1
- Northwood, John, of Westport, county Mayo1
- Norton, John David, barrister Knight 18421
- Nott, William, Major-General; GCB1
- O'Brien, James Thomas, Bishop of Ossory, Ferns and Leighlin 184d1
- O'Brien, Robert, Captain; RN1
- O'Connell, Daniel, of Add MS 401221
- O'Grady, Standish, 2nd Viscount Guillamore 18401
- Ochterlony, David, 1st Baronet 1816, Lieutenant-Colonel1
- Orpen, Charles Edward Herbert, MD, of Dublin1
- Osborne, Ralph, formerly Bernal; MP; Secretary of the Admiralty1
- Osborne, William Godolphin, Captain; son of Francis, 1st Baron Godolphin1
- Oswald, John, Colonel; General 1837; GCB 1824; GCMG 18381
- Ottley, Richard, formerly Chief Justice of Ceylon1
- Owen, John, 1st Baronet, MP1
- Paget, Henry William, 2nd Earl of Uxbridge, 1st Marquess of Anglesey1
- Paine, Richard1