- WADE, GEORGE WOOSUNG (1858 - 1941), cleric, professor, and author
- WADE-EVANS, ARTHUR WADE (1875 - 1964), clergyman and historian
- WAITHMAN, ROBERT (1764 - 1833), lord mayor of London
- WALEYS, JOHANNES - see WALLENSIS, JOHANNES
- WALKER-HENEAGE-VIVIAN, ALGERNON (1871 - 1952), admiral
- WALLACE, ALFRED RUSSEL (1823 - 1913), naturalist and social reformer
- WALLENSIS
- WALTER SEYS, landowner - see VAUGHAN
- WALTER, HENRY (1611 - 1678), Puritan preacher, Independent
- WALTER, LUCY (1630? - 1658), mistress of king Charles II
- WALTER, ROWLAND (Ionoron Glan Dwyryd; 1819 - 1884), quarryman and poet
- WALTERS, DAVID (EUROF; 1874 - 1942), minister (Congl.) and writer
- WALTERS, EVAN JOHN (1893 - 1951), artist
- WALTERS, GARETH (1928 - 2012), composer
- WALTERS, HENRY (1766 - 1829), printer - see THOMAS, RHYS
- WALTERS, IRWYN RANALD (1902 - 1992), musician and administrator
- WALTERS, JOHN (1721 - 1797), cleric and lexicographer
- WALTERS, JOHN (1760 - 1789), cleric, poet, and scholar
- WALTERS, THOMAS (1729 - 1794), Independent minister
- WALTERS, THOMAS GLYN (WALTER GLYNNE; 1890 - 1970), tenor
- WARD, JOHN (1856 - 1922), museum official, and antiquary
- WARDLE, GWYLLYM LLOYD (1762? - 1833), Quaker and Wesleyan preacher and poet
- WARING, ANNA LETITIA (1823 - 1910), poet - see WARING, ELIJAH
- WARING, ELIJAH (c. 1788 - 1857), merchant, author and publisher
- WARLOW, EDITH - see PICTON-TURBERVILL, EDITH
- WARNER, MARY WYNNE (1932 - 1998), mathematician
- WARRINGTON, WILLIAM (1735 - 1824), historian and dramatist
- WATCYN CLYWEDOG (fl. c. 1630-1650), poet
- WATCYN o FEIRION - see JONES, WATKIN
- WATCYN WYN - see WILLIAMS, WATKIN HEZEKIAH
- WATERHOUSE, THOMAS (1878 - 1961), industrialist and public figure
- WATKIN, EVAN (fl. circa 1801 - circa 1845), schoolmaster and writer
- WATKIN, MORGAN (1878 - 1970), scholar, university professor
- WATKIN, WILLIAM RHYS (1875 - 1947), Baptist minister
- WATKIN-JONES, ELIZABETH (1887 - 1966), author of children's books
- WATKINS of GLANTAWE, Baron - see WATKINS, TUDOR ELWYN
- WATKINS, ALBERT JOHN (1922 - 2011), cricketer
- WATKINS, ALLAN - see WATKINS, ALBERT JOHN
- WATKINS, JOSHUA (1769 or 1770 - 1841), Baptist minister
- WATKINS, Sir PERCY EMERSON (1871 - 1946), civil servant
- WATKINS, Sir TASKER (1918 - 2007), barrister and judge
- WATKINS, THOMAS (fl. 17th century), Puritan preacher, Particular Baptist
- WATKINS, THOMAS ARWYN (1924 - 2003), Welsh scholar
- WATKINS, THOMAS EVAN (Eiddil Ifor, Ynyr Gwent; 1801 - 1889), eisteddfodwr
- WATKINS, TUDOR ELWYN (Baron Watkins of Glantawe), (1903 - 1983), Labour politician
- WATKINS, VERNON PHILLIPS (1906 - 1967), poet
- WATKINS, WILLIAM (fl. 1750-1762), cleric in Breconshire and author
- WATKYNS, ROWLAND (c.1614 - 1664), cleric and author
- WATT, JAMES DAVID GIBSON- - see GIBSON-WATT, JAMES DAVID
- WATTS, ANNE - see PHILLIPS, DAVID RHYS