- DAVIES, MARGARET SIDNEY (1884 - 1963), art collector and benefactress
- DAVIES, MARY (1855 - 1930), singer
- DAVIES, MARY (Mair Eifion; 1846 - 1882), poet
- DAVIES, MATTHEW (fl. 1620), politician
- DAVIES, MATTHEW WILLIAM (1882 - 1947), musician
- DAVIES, MAURICE - see DAFYDD, MAURICE
- DAVIES, MILES DAVIES - see DAVIES, MYLES DAVIES
- DAVIES, MORGAN (d. 1857), sexton of Llanelltyd, Merioneth, and minor poet
- DAVIES, MORRIS (1796 - 1876), author, hymnologist, and musician
- DAVIES, MORRIS (Meurig Ebrill; 1780 - 1861), poet
- DAVIES, MORRIS (Moi Plas; 1891 - 1961), quarryman, local historian and researcher
- DAVIES, MOSES (1799 - 1866), musician
- DAVIES, MYLES (or MILES) DAVIES (1662 - 1715?), religious controversialist and bibliographer
- DAVIES, MYRIEL IRFONA (1920 - 2000), campaigner for the United Nations
- DAVIES, NAN - see DAVIES, ANNIE
- DAVIES, NAUNTON WINGFIELD (1852 - 1925), physician - see DAVIES, HENRY
- DAVIES, NOËLLE (1899 - 1983), littérateur, educationist, and political activist
- DAVIES, OLIVER (fl. c. 1820), harpist
- DAVIES, OWEN (1840 - 1929), Baptist minister
- DAVIES, OWEN (1752 - 1830), Wesleyan Methodist minister
- DAVIES, OWEN (1719 - 1792), Independent minister
- DAVIES, OWEN HUMPHREY (Eos Llechid; 1828 - 1898), quarryman, musician, and cleric
- DAVIES, OWEN PICTON (1882 - 1970), journalist
- DAVIES, RACHEL (Rahel o Fôn; 1846 - 1915), lecturer and preacher
- DAVIES, RANDOLPH (d. 1695), cleric and controversialist
- DAVIES, REES (1694? - 1767), Independent minister
- DAVIES, REES Canerw (d. c. 1788) Llanboidy - see DAVIES, BENJAMIN
- DAVIES, REUBEN (Reuben Brydydd y Coed; 1808 - 1833), poet and schoolmaster
- DAVIES, RHISIART MORGAN (1903 - 1958), scientist and professor of physics
- DAVIES, RHYS (Y Glun Bren; 1772 - 1847), eccentric Independent preacher
- DAVIES, RHYS (1795 - 1838), engineer and industrialist
- DAVIES, RHYS JOHN (1877 - 1954), politician and trade union official
- DAVIES, RICHARD (1501? - 1581), bishop and biblical translator
- DAVIES, RICHARD (1818 - 1896), M.P.
- DAVIES, RICHARD (Mynyddog; 1833 - 1877), poet, singer, and eisteddfod conductor
- DAVIES, RICHARD (Tafolog; 1830 - 1904), poet and critic
- DAVIES, RICHARD (1635 - 1708), Quaker
- DAVIES, RICHARD (1814 - 1854), secretary of the Church Missionary Society
- DAVIES, RICHARD (Isgarn; 1887 - 1947), farmer-shepherd and poet
- DAVIES, RICHARD - see DAVIS, RICHARD
- DAVIES, RICHARD OWEN (1894 - 1962), scientist and professor of agricultural chemistry
- DAVIES, ROBERT (Bardd Nantglyn; 1769 - 1835), poet and grammarian
- DAVIES, ROBERT (1790 - 1841), Calvinistic Methodist elder
- DAVIES, ROBERT (1816 - 1905), philanthropist
- DAVIES, ROBERT (Asaph Llechid; 1834 - 1858), musician
- DAVIES, ROBERT (Cyndeyrn; 1814 - 1867), musician
- DAVIES, ROBERT, wool-making machinery maker - see DAVIES, JOHN
- DAVIES, ROBERT GWYNEDDON (d. 1928), collector of manuscripts - see DAVIES, JOHN
- DAVIES, Sir ROBERT HENRY (1824 - 1902), governor of the Punjab - see DAVIES, Sir DAVID
- DAVIES, ROBERT HUMPHREY (Gomerian; 1856 - 1947), correspondent of Welsh and English newspapers