| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 761 | Pany | Welsh | Son of Harry. | M | |
| 762 | Parry | Welsh | Son of Harry. | M | |
| 763 | Pedr | Welsh | Welsh form of Peter 'rock'. | M | |
| 764 | Peissawg | Welsh | Legendary king of Brittany. | M | |
| 765 | Pembroke | Welsh | Lives in the headland. | M | |
| 766 | Penarddun | Welsh | Legendary daughter of Beli. | F | |
| 767 | PenIlyn | Welsh | From the lake's headland. | M | |
| 768 | Penn | Welsh | From the peak. | M | |
| 769 | Penvro | Welsh | From pembroke. | M | |
| 770 | Peredur | Welsh | Legendary son of Evrawg. | M | |
| 771 | Perry | Welsh | Son of Harry. | M | |
| 772 | Plys | Welsh | Son of Rhys. | M | |
| 773 | Powell | Welsh | Son of Howell. | M | |
| 774 | Preece | Welsh | Son of Rhys. | M | |
| 775 | Price | Welsh | Son of Rhys. | M | |
| 776 | Pryderi | Welsh | Legendary son of Pwyll. | M | |
| 777 | Prydwen | Welsh | Handsome. | M | |
| 778 | Puw | Welsh | Welsh form of Pugh 'son of Hugh'. | M | |
| 779 | Pwyll | Welsh | Son of Howell. | M | |
| 780 | Pyrs | Welsh | Welsh form of Pierce 'rock'. | M | |