Name
- O'Callaghan, Theodore, of the Commissariat département1
- O'Neill, John Bruce Richard, 3rd Viscount O'Neill 18411
- Odell, William, Lieutenant-Colonel; MP1
- OgNell, Peter, RC priest at Ballymacoda1
- Ogilvic, William, of Ardglass, county Down; husband of Bmilia Mary, Dowager Duchess of Leinster1
- Onslow, Arthur, Speaker of the House of Commons1
- Paget, John Warren, attorney, of Atherstone1
- Palmer, Guy, MP1
- Parker, Thomas, 1st Baron Parker, 1st Earl of Macclesfield, 1667-17321
- Parker, Thomas, Knight , Chief Baron of the Exchequer1
- Parker, Thomas, of Add MS 402531
- Parliament1
- Paul V, Pope1
- Paul, George, Master of Requests1
- Peasley, Elizabeth, widow of George Peasley1
- Pelham, Henry, Prime Minister, 1694-17541
- Pelham, Thomas, son of Thomas and Elizabeth Pelham; Secretary to the Embassy at Paris1
- Perkins, Hutton, of Add MS 355861
- Peter II, of Portugal1
- Philip III, King of Spain1