Name
- Nugent, Robert, Viscount Clare (1766) and (1776) Earl Nugent1
- Nugent-Temple-Grenville, George, formerly Grenville 1st Marquess of Buckingham1
- Oglethorpe, James Edward, Lieutenant-General1
- Olivecrantz, Johan Paulin, Swedish diplomatist1
- Onslow, Richard, Lieutenant-General1
- Osbaldeston, Richard, Bishop of London1
- Osborne, Bridget, née Bertie; wife of Thomas, 1st Duke of Leeds1
- Osborne, Catherine, 2nd wife of Francis 5th Duke of Leeds, 1764-18371
- Osborne, Francis Godolphin D'Arcy, Marquess of Carmarthen; 7th Duke of Leeds 18381
- Osborne, George William Frederick, 6th Duke of Leeds, d 18381
- Osborne, Thomas, 1st Duke of Leeds, 1632-17121
- Osborne, Thomas, Marquess of Carmarthen, son of Thomas, 4th Duke of Leeds1
- Osorio Alarçon, Giuseppe, Sardinian Foreign Minister1
- Owen, Edward, publisher of the London Gazette1
- Page, John, DD; Vicar of Gillingham, county Kent1
- Palairet, Jean, Dutch Agent in England1
- Palatinate of the Rhine1
- Palling, William, of Painswick, county Gloucestershire1
- Paris, Joseph, English agent in France1
- Parker, Abraham, of Egerton MS 33371