- JONES, THOMAS IVOR (1896 - 1969), solicitor
- JONES, THOMAS JERMAN (1833 - 1890), missionary for twenty years with the Welsh Calvinistic Methodists
- JONES, THOMAS JESSE (1873 - 1950), educationalist, statistician, and sociologist
- JONES, THOMAS JOHN RHYS (1916 - 1997), teacher, lecturer and author
- JONES, THOMAS LLECHID (1867 - 1946), cleric, author and bibliographer
- JONES, THOMAS LLEWELYN (1915 - 2009), poet and prolific writer
- JONES, THOMAS LLOYD (Gwenffrwd; 1810 - 1834), poet
- JONES, THOMAS MICHAEL - see MICHAELIONES, THOMAS
- JONES, THOMAS MORRIS (Gwenallt; 1859 - 1933), Calvinistic Methodist minister, writer and journalist
- JONES, THOMAS OWEN (Gwynfor; 1875 - 1941), librarian, dramatist, actor and producer
- JONES, THOMAS PARRY (1935 - 2013), inventor, entrepreneur and philanthropist
- JONES, THOMAS ROBERT (Gwerfulyn; 1802 - 1856), founder of the charitable movement, the True Ivorites
- JONES, THOMAS ROCYN (1822 - 1877), bonesetter
- JONES, THOMAS TUDNO (Tudno; 1844 - 1895), cleric and poet
- JONES, THOMAS WILLIAM (Baron Maelor of Rhos), (1898 - 1984), Labour politician
- JONES, TOM ELLIS (1900 - 1975), Baptist minister and college Principal
- JONES, TREVOR ALEC (1924 - 1983), Labour politician
- JONES, WALTER (d. 1819) Cefn Rug,, commissioner under land enclosure acts
- JONES, WALTER DAVID MICHAEL (1895 - 1974), painter and poet
- JONES, WALTER IDRIS (1900 - 1971), Director General of Research Development for the National Coal Board (NCB)
- JONES, WATCYN SAMUEL (1877 - 1964), agricultural administrator and principal of a theological college
- JONES, WATKIN (Watcyn o Feirion; 1882 - 1967), postmaster, shopkeeper, folk poet, setter and tutor of cerdd dant
- JONES, WILFRID - see JONES, ROBERT WILFRID
- JONES, WILLIAM (1857 - 1915), Member of Parliament
- JONES, WILLIAM (Bleddyn; 1829? - 1903), antiquary, local historian, geologist, and collector of folk-lore
- JONES, WILLIAM (1814? - 1895), Wesleyan Reformer,' afterwards Independent minister
- JONES, WILLIAM (1834 - 1895), Baptist minister
- JONES, WILLIAM (Ehedydd Iâl; 1815 - 1899), farmer and poet
- JONES, WILLIAM (1826 - 1899), secretary to the Peace Society
- JONES, WILLIAM (1851 - 1931), Calvinistic Methodist minister
- JONES, WILLIAM (1675? - 1749), mathematician
- JONES, WILLIAM (1726 - 1795), antiquary and poet
- JONES, WILLIAM (d. c. 1700) south-western Wales, Baptist minister
- JONES, WILLIAM (1718 - 1773?), early Methodist exhorter, and possibly the first Anglesey Methodist
- JONES, WILLIAM (d. 1679), Puritan minister
- JONES, WILLIAM (1806 - 1873), cleric and man of letters
- JONES, WILLIAM (1762 - 1846), Scotch-Baptist minister, editor, and author
- JONES, WILLIAM (Gwrgant; 1803 - 1886), lawyer and writer
- JONES, WILLIAM (1790 - 1855), Baptist Minister and writer
- JONES, WILLIAM (1755 - 1821), Evangelical cleric
- JONES, WILLIAM (1770 - 1837), Calvinistic Methodist minister
- JONES, WILLIAM (1784 - 1847), Independent minister and divine
- JONES, WILLIAM (1764 - 1822), hymn writer
- JONES, Sir WILLIAM (1566 - 1640), judge
- JONES, Sir WILLIAM (1888 - 1961), administrator and politician
- JONES, WILLIAM (1896 - 1961), poet and minister
- JONES, WILLIAM (Gwilym Myrddin; 1863 - 1946), poet
- JONES, Sir WILLIAM (1746 - 1794), philologist - see JONES, WILLIAM
- JONES, WILLIAM (d. 1820), president - see JONES, EDWARD
- JONES, WILLIAM (d. 1893) - see JONES, ABEL