Name
- Morris, Hugh1
- Mortimer, Roger, of Add MS 149351
- Morys ab Howel ab Tudur1
- Owain Gwynedd, alias Owain Efan1
- Owen, Gronwy, Reverend; alias Gronwy Ddu1
- Owen, Miles1
- Owen, Thomas, Reverend1
- Philip, Richard1
- Prichard, Michael1
- Rhisiart Gele1
- Rhisiart Jorwerth1
- Rhys Brychan1
- Rhys Ddu Brydydd1
- Rhys Goch Eryri1
- Rhys Goch Glyndyfrdwy, of Add MS 149011
- Rhys ab Edward1
- Rhys ab Harri1
- Rhys o Garno, alias Rhys o Drwen1
- Robert Leiaf1
- Robert ab Davydd1