- DAVIES, JOHN (1700? - 1792), cleric
- DAVIES, JOHN (Siôn Dafydd Berson; 1675 - 1769)
- DAVIES, JOHN (Siôn Gymro; 1804 - 1884), Independent minister, linguist, and commentator
- DAVIES, JOHN (1772 - 1855), school teacher and missionary
- DAVIES, JOHN (1795 - 1861), cleric and philosopher
- DAVIES, JOHN (1803 - 1854), Independent minister
- DAVIES, JOHN (Gwyneddon; 1832 - 1904), printer and journalist
- DAVIES, JOHN (John Davies of Nerquis; 1799? - 1879), Calvinistic Methodist minister
- DAVIES, JOHN (1823 - 1874), Independent minister
- DAVIES, JOHN (1787 - 1855), stone-mason and composer
- DAVIES, JOHN (1784 - 1845), Wesleyan minister
- DAVIES, JOHN (1860 - 1939), Welsh bibliographer and genealogist
- DAVIES, JOHN (Ossian Gwent; 1839 - 1892), poet
- DAVIES, JOHN (Taliesin Hiraethog; 1841 - 1894), farmer and poet
- DAVIES, JOHN (1843 - 1917) Pandy, Calvinistic Methodist minister and antiquary
- DAVIES, JOHN (1868 - 1940), author
- DAVIES, JOHN (1781 - 1848) Fronheulog,, one of the most prominent lay leaders of Calvinistic Methodism in his day
- DAVIES, JOHN (Peirianydd Gwynedd; 1783 - 1855), engineer, carpenter, smith, clock-maker, poet, and musician
- DAVIES, JOHN (1938 - 2015), historian
- DAVIES, JOHN (1882 - 1937), secretary of the South Wales District of the W.E.A., 1919-1937
- DAVIES, JOHN (John Davies, Taihirion; 1825 - 1904), Welsh Independent minister
- DAVIES, JOHN - see RHYS, JOHN DAVID
- DAVIES, JOHN BREESE (1893 - 1940), writer, musician, and a specialist in cerdd dant
- DAVIES, JOHN CADVAN (Cadvan; 1846 - 1923), Wesleyan minister
- DAVIES, JOHN DANIEL (1874 - 1948), editor and author
- DAVIES, JOHN DAVID (1831 - 1911), cleric and antiquary
- DAVIES, JOHN ELIAS (Telynor y Gogledd; 1847 - 1883), harpist and accompanist
- DAVIES, JOHN EVAN (Rhuddwawr; 1850 - 1929), Calvinistic Methodist minister and author
- DAVIES, JOHN GLYN (1870 - 1953), scholar, songwriter and poet
- DAVIES, JOHN GRIFFITH (1836 - 1861), poet and translator
- DAVIES, JOHN GWYNORO (1855 - 1935), Calvinistic Methodist minister
- DAVIES, JOHN HAYDN (1905 - 1991), teacher and choirmaster
- DAVIES, JOHN HUMPHREYS (1871 - 1926), bibliographer, man of letters, and educationist
- DAVIES, JOHN IDRIS (Ioan Idris; 1821 - 1889), Welsh-American poet
- DAVIES, JOHN LLEWELYN (1826 - 1916), Fellow of Trinity College, Cambridge - see DAVIES, JOHN
- DAVIES, JOHN LLEWELYN (1826 - 1916), translator, chaplain, and one of the most successful of the early climbers of the Alps
- DAVIES, JOHN LLOYD (1801 - 1860) Blaendyffryn, Alltyrodyn,, M.P.
- DAVIES, JOHN OSSIAN (1851 - 1916), Congregational minister and author
- DAVIES, JOHN PARK (1879 - 1937), Unitarian minister
- DAVIES, JOHN PHILIP (1786 - 1832), Baptist minister, commentator, and divine
- DAVIES, JOHN SALMON (1940 - 2016), scientist
- DAVIES, JONATHAN CEREDIG (1859 - 1932), traveller, genealogist, and folk-lorist
- DAVIES, JOSEPH (? - 1831?), solicitor and founder of the periodical Y Brud a Sylwydd
- DAVIES, JOSEPH E. (1812 - 1881), Welsh Calvinistic minister in America and author
- DAVIES, JOSEPH EDWARD (1876 - 1958), international lawyer
- DAVIES, Sir LEONARD TWISTON (1894 - 1953), patron of the arts and of folk life studies
- DAVIES, LEWIS (1777 - 1828), major-general
- DAVIES, LEWIS (1863 - 1951), novelist, local historian, schoolmaster
- DAVIES, LOUIE MYFANWY - see THOMAS, LOUIE MYFANWY
- DAVIES, MARGARET (fl. c. 1700-1785?), transcriber of many of the manuscripts preserved in our public collections