- Palfrey, Eiry
- Palmer, Caroline
- Parker, Mike
- Parri, Ieuan
- Parry, Enid
- Parry, Glyn
- Parry, Gruffydd
- Parry, R. Palmer
- Parry, Richard Gwynedd
- Parry, Robert Ivor
- Parry, Thomas
- Parry-Williams, Thomas Herbert
- Peate, Iorwerth Cyfeiliog
- Phillips, Edgar
- Phillips, Ieuan
- Phillips, Ioan
- Phillips, Llywelyn
- Phillips, Rob
- Phillips, Thomas Oswald
- Phillips, William
- Pierce, Thomas Jones
- Pike, David
- Powell, Carole
- Powell, Dewi Watkin
- Powell, Ifor Ball
- Price, Angharad
- Price, Cecil John Layton
- Price, David Trevor William
- Price, Watkin William
- Prior-Morris, John
- Pritchard, Elfyn
- Pryce, Huw