- P. A. MÔN - see JONES, BENJAMIN
- PAB, Y - see OWEN, WILLIAM
- PADARN (fl. c. 560), Celtic saint
- PADLEY, WALTER ERNEST (1916 - 1984), Labour politician
- PAGE, JOHN (Ioan Glan Dyfrdwy; 1830? - 1852), poet
- PAGE, LESLIE ALUN (1920 - 1990), Minister (Cong.)
- PAGET family (marquesses of Anglesey), Plas Newydd, Llanedwen
- PAGET, 9th Baron - see PAGET
- PAGET, ELIZABETH SHIRLEY VAUGHAN (1924 - 2017), author - see PAGET, GEORGE CHARLES HENRY VICTOR
- PAGET, GEORGE CHARLES HENRY VICTOR (7th Marquess of Anglesey), (1922 - 2013), soldier, historian, conservationist
- PAINTER family, printers
- PALMER, ALFRED NEOBARD (1847 - 1915), historian
- PALMER, HENRY (1679 - 1742), Independent minister
- PAMPLIN, WILLIAM (1806 - 1899), botanist
- PANTON, PAUL (1727 - 1797), barrister-at-law and antiquary
- PARCELL, GEORGE HENRY (1895 - 1967), musician
- PARK, JAMES (1636 - 1696), Quaker
- PARKER, JOHN (1798 - 1860), cleric and artist
- PARKES, JAMES - see PARK, JAMES
- PARKHOUSE, WILLIAM GILBERT ANTHONY (1925 - 2000), cricketer
- PARR-DAVIES, HARRY (1914 - 1955), pianist and composer
- PARRI, HARRI (Harri Bach o Graig-y-gath; 1709? - 1800), strolling poet
- PARROTT, HORACE IAN (1916 - 2012), teacher and composer
- PARRY family Madryn, Llŷn
- PARRY, ABEL JONES (1833 - 1911), Baptist minister
- PARRY, BLANCHE (1508? - 1590)
- PARRY, BLANCHE (1507/8 - 1590), Chief Gentlewoman of Queen Elizabeth's most honourable Privy Chamber and Keeper of Her Majesty's jewels
- PARRY, CALEB HILLIER (1755 - 1822), physician - see PARRY, JOSHUA
- PARRY, CHARLES (1824 - 1894), artist - see PARRY, JOSEPH
- PARRY, DAVID (Dewi Moelwyn; 1835 - 1870), Independent minister, and poet
- PARRY, DAVID (1794 - 1877), cleric
- PARRY, DAVID (1760 - 1821), Calvinistic Methodist minister
- PARRY, DAVID (1682? - 1714), scholar
- PARRY, DAVID HENRY (1793 - 1826), artist - see PARRY, JOSEPH
- PARRY, Sir DAVID HUGHES (1893 - 1973), lawyer, jurist, university administrator
- PARRY, EDGAR WILLIAMS (1919 - 2011), surgeon
- PARRY, EDMUND WYNNE (1855 - 1897), minister - see PARRY, GRIFFITH
- PARRY, EDWARD (1798 - 1854), publisher and antiquary
- PARRY, EDWARD (1723 - 1786), Methodist exhorter, poet and hymn-writer
- PARRY, GEORGE (1613? - 1678), cleric, and author of a Welsh metrical version of the Psalms
- PARRY, GRIFFITH (1827 - 1901), Calvinistic Methodist minister, and author
- PARRY, HARRY - see PARRY, OWEN HENRY
- PARRY, HENRY (1766? - 1854), cleric and antiquary
- PARRY, HENRY - see PERRI, HENRY
- PARRY, HUGH (Cefni; 1826 - 1895), Baptist minister, poet, littérateur, and theologian
- PARRY, HUMPHREY (c. 1772 - 1809), schoolmaster, member of the Gwyneddigion and Cymreigyddion Societies of London
- PARRY, IDRIS FREDERICK (1916 - 2008), scholar of German literature, writer and broadcaster
- PARRY, JAMES RHYS (fl. 1570?-1625?), poet and author of a Welsh metrical version of the Psalms
- PARRY, JOHN (Bardd Alaw; 1776 - 1851), musician
- PARRY, JOHN (1775 - 1846), Calvinistic Methodist minister, man of letters, and editor