Name
- O'Rourke, Count1
- Ogle, Samuel, Revenue Comissioner in Ireland1
- Ordnance Office1
- Osborne, Anne, 2nd wife of Peregrine Hyde, 3rd Duke of Leeds1
- Osborne, Bridget, wife of Peregrine 2nd Duke of Leeds1
- Osborne, Charlotte, wife of George 6th Duke of Leeds1
- Osborne, Elizabeth, 1st wife of Peregrine Hyde, 3rd Duke of Leeds1
- Osborne, Family1
- Osborne, Juliana, 3rd wife of Peregrine Hyde, 3rd Duke of Leeds1
- Osborne, Peregrine Hyde, Marquess of Carmarthen; 3rd Duke of Leeds 17291
- Osborne, Thomas, Marquess of Carmarthen, son of Thomas, 4th Duke of Leeds1
- Oughton, Thomas1
- Oxenden, Family1
- Pariaot, Envoy from Lorraine at the Hague1
- Parker, Abraham, of Add MS 280531
- Parry, Gregory1
- Pelham, Thomas, 1st Baron Pelham of Laughton1
- Penancöet de Kéroualle, Louise Renée, Duchess of Portsmouth1
- Penneck, John1
- Pepys, Charles Christopher, 1st Earl of Cottenham1