Name
- Owain Gwynedd, alias Owain Efan1
- Owain ab Llywelyn ab y Moel1
- Owen, David, of Add MS 148731
- Owen, Family1
- Owen, Gronwy, Reverend; alias Gronwy Ddu1
- Owen, Humphrey, of Add MS 148661
- Owen, Thomas, of Add MS 148731
- Pabo, King1
- Pezron, Paul, Abbé de la Charmoye1
- Philip, Richard1
- Philip, William1
- Powel, Lewis1
- Price, Thomas, of Plas Jolyn1
- Prichard, John1
- Principality of Wales1
- Raff ab Robert1
- Reynallt, John Rees1
- Rhydderch, John1
- Rhys Penardd1
- Rhys Vynglwyd1