- PERRYN, Sir RICHARD (1723 - 1803), judge
- PERYF ap CEDIFOR WYDDEL (fl. 1170), poet
- PETER - see PETER of LEE
- PETER of LEE ('de Leia') (d. 1198), bishop of S. Davids
- PETER, DAVID (1765 - 1837), Congregational minister and academy principal
- PETER, JOHN (Ioan Pedr; 1833 - 1877), Independent minister and college tutor, and Welsh scholar
- PETERSEN, JACK - see PETERSON, JOHN CHARLES
- PETERSON, JOHN CHARLES (1911 - 1990), boxer
- PETROC (fl. 6th century), saint
- PETROC Saint - see PEDROG, Saint
- PETTINGALL, JOHN (1708 - 1781), antiquary
- PETTS, RONALD JOHN (1914 - 1991), artist
- PHAER, THOMAS (1510? - 1560), lawyer, physician, and translator
- PHAYER, THOMAS - see PHAER, THOMAS
- PHILIP ap RHYS (fl. 1530), Tudor organist and composer
- PHILIPPS family Picton,
- PHILIPPS family Cwmgwili,
- PHILIPPS family Tregybi, Porth-Einion, Cardigan priory,
- PHILIPPS, Sir GRISMOND PICTON (1898 - 1967), soldier and public figure
- PHILIPPS, Sir IVOR (1861 - 1940), soldier, politician and businessman
- PHILIPPS, JENKIN THOMAS (d. 1755), tutor and author
- PHILIPPS, Sir JOHN (1666? - 1737) Picton Castle,, religious, educational, and social reformer
- PHILIPPS, Sir JOHN HENRY - see SCOURFIELDSir JOHN HENRY
- PHILIPPS, JOHN WYNFORD (1st Viscount St. Davids, 13th Baronet, of Picton Castle), (1860 - 1938)
- PHILIPPS, LAURENCE RICHARD (1st. BARON MILFORD, 1st baronet), (1874 - 1962), philanthropist, industrialist, sportsman, and a member of one of the most prominent old gentry families of Pembrokeshire
- PHILIPPS, LEONORA (1862 - 1915), campaigner for women's rights
- PHILIPPS, OWEN COSBY (Baron Kylsant), (1863 - 1937), ship-owner
- PHILIPPS, WOGAN (2nd Baron Milford), (1902 - 1993), politician and artist
- PHILIPS, Tregybi, Porth-Einion, Cardigan priory - see PHILIPPS
- PHILIPS, KATHERINE (1632 - 1664), poet - see PHILIPPS family of TREGYBI
- PHILLIMORE, EGERTON GRENVILLE BAGOT (1856 - 1937), scholar
- PHILLIPPS, Sir THOMAS (1792 - 1872), antiquary, bibliophile, and collector of manuscripts, records, books, etc.
- PHILLIPS, BENJAMIN (1750 - 1839), Unitarian Baptist minister
- PHILLIPS, CLIFFORD (1914 - 1984), journalist
- PHILLIPS, DANIEL (fl. 1680-1722), Independent minister
- PHILLIPS, DANIEL (1826 - 1905), minister (Congl.) and lecturer
- PHILLIPS, DANIEL MYDRIM (1863 - 1944), minister (CM), teacher and author
- PHILLIPS, DANIEL THOMAS (1842 - 1905), Baptist minister and American consul
- PHILLIPS, DAVID (1751 - 1825), Unitarian minister
- PHILLIPS, DAVID (1812 - 1904), Calvinistic Methodist minister, poet and editor
- PHILLIPS, DAVID (1874 - 1951), minister (Presb.), philosopher and college principal
- PHILLIPS, DAVID RHYS (1862 - 1952), librarian
- PHILLIPS, EDGAR (Trefîn; 1889 - 1962), tailor, school-teacher, poet, and Archdruid of Wales, 1960-62
- PHILLIPS, EDWARD (1716 - c. 1776), cleric
- PHILLIPS, ELIZABETH (fl. 1836) Penrhyn,, hymnwriter
- PHILLIPS, EVAN (1829 - 1912), Calvinistic Methodist minister
- PHILLIPS, EVAN OWEN (1826 - 1897), dean of S. Davids
- PHILLIPS, HENRY (1719 - 1789), Baptist minister
- PHILLIPS, JAMES (1703 - 1783), cleric and antiquarian
- PHILLIPS, JAMES (1847 - 1907), historian of Pembrokeshire