- WATTS, HELEN JOSEPHINE (1927 - 2009), singer
- WAYNE family, industrialists
- WEBB, HARRI (1920 - 1994), librarian and poet
- WEBBER, FRANK EDWARD (1893 - 1963), general manager of Western Mail and Echo Ltd. - see WEBBER, Sir ROBERT JOHN
- WEBBER, Sir ROBERT JOHN (1884 - 1962), managing director of Western Mail and Echo Limited
- WELSH FREEHOLDER - see JONES, DAVID
- WELSH, FREDDIE - see THOMAS, FREDERICK HALL
- WEST, DANIEL GRANVILLE (Baron Granville-West of Pontypool), (1904 - 1984), Labour politician
- WHEELER, Dame OLIVE ANNIE (1886 - 1963), psychologist and educationist
- WHEELER, Dame OLIVE ANNIE (1886 - 1963), Professor of Education
- WHELDON, THOMAS JONES (1841 - 1916), Calvinistic Methodist minister
- WHELDON, Sir WYNN POWELL (1879 - 1961), lawyer, soldier, administrator
- WHITE, Baroness - see WHITE, EIRENE LLOYD
- WHITE, DAVID ARCHIBALD PRICE - see PRICE-WHITE, DAVID ARCHIBALD PRICE
- WHITE, EIRENE LLOYD (Baroness White), (1909 - 1999), politician
- WHITE, JOHN (1590 - 1645), Puritan
- WHITE, RAWLINS (fl. 1485?-1555), one of the only three Marian martyrs in Wales
- WHITE, RAWLYN - see WHITE, RAWLINS
- WHITE, RICHARD - see GWYN, RICHARD
- WHITEHEAD, LEWIS STANLEY (1889 - 1956), secretary of the Representative Body of the Church in Wales
- WHITFORD, RICHARD (d. 1542?), priest and author
- WHITNEY, BLANCHE - see TROY, BLANCHE HERBERT
- WIL AWST - see AUGUSTUS, WILLIAM
- WIL BRYCH - see ROBERTS, WILLIAM
- WIL IFAN - see EVANS, WILLIAM
- WIL SAM - see JONES, WILLIAM SAMUEL
- WIL YSGEIFIOG - see EDWARDS, WILLIAM
- WILDE, JIMMY - see WILDE, WILLIAM JAMES
- WILDE, WILLIAM JAMES (1892 - 1969), boxer, world flyweight champion (1916-23)
- WILFRE, bishop
- WILFREDUS Bishop - see WILFRE, Bishop
- WILIAM EGWAD (fl. c. 1450), poet
- WILIAM LLYN (1534 or 1535 - 1580) Llŷn, poet
- WILIAM PENLLYN (fl. c. 1550-1570), chief harpist
- WILIEMS, THOMAS (1545 or 1546 - 1622?) Trefriw, priest, scribe, lexicographer, and physician
- WILKINS family
- WILKINS, CHARLES (Catwg; 1830 - 1913), writer
- WILKINSON, JOHN (1728 - 1808), 'father of the iron trade'
- WILKINSON, (c.1744 - 1808) - see ,
- WILKS, JOHN (1764 or 1765 - 1854), attorney - see DAVIES, JOHN
- WILLANS, JOHN BANCROFT (1881 - 1957), country landowner, antiquarian and philanthropist
- WILLETT, MRS - see COOMBE TENNANT, WINIFRED MARGARET
- WILLIAM ALAW (fl. c. 1535), poet
- WILLIAM, DAVID (1720 - 1794), hymn-writer
- WILLIAM(S), LEWIS (1774 - 1862), peripatetic teachers
- WILLIAM, LODWICK (fl. 1689?), writer of interludes
- WILLIAM(S), ROBERT (1744 - 1815), poet, and farmer
- WILLIAM, THOMAS (1761 - 1844), Independent minister, and hymn-writer
- WILLIAM, THOMAS (1697 - 1778) Mynydd-bach, Independent minister, and author
- WILLIAM, THOMAS (1717 - 1765), Methodist exhorter and later Independent minister