- RHYS FYCHAN - see RHYS GRYG
- RHYS GOCH ERYRI (fl. early 15th century), poet
- RHYS GOCH GLYNDYFRDWY (fl. c. 1460), poet
- RHYS GOGH ap RHICCERT
- RHYS GRYG (d. 1234), prince
- RHYS IFANC Sir (1325) - see RHYS ap GRUFFYDD
- RHYS NANMOR (fl. 1480-1513), poet
- RHYS PENNARDD (fl. c. 1480), a poet
- RHYS (1325) - see RHYS ap GRUFFYDD
- RHYS WYN ap CADWALADR (fl. c. 1600) Giler,, poet
- RHYS Sir (1325) - see RHYS ap GRUFFYDD
- RHYS, Arglwydd - see RHYS ap GRUFFYDD
- RHYS, CHARLES ARTHUR URYAN - see RHYS, WALTER FITZURYAN
- RHYS, EDWARD PROSSER (1901 - 1945), journalist, poet and publisher
- RHŶS, ELIZABETH (1841 - 1911), teacher, hostess and campaigner for women's rights
- RHYS, ERNEST (PERCIVAL) (1859 - 1946), poet, author, and editor
- RHYS, HYWEL (1715? - 1799), poet
- RHYS, IFAN THOMAS (fl. mid 18th century), poet
- RHYS, Sir JOHN (1840 - 1915), Celtic scholar
- RHYS, JOHN DAVID (1534 - 1609?), physician and grammarian
- RHYS, Lord - see RHYS ap GRUFFYDD
- RHYS, MARY (1744? - 1842), rhymester - see RHYS, DAVID
- RHYS, MARY CATHERINE - see LLEWELYN, MARY PENDRILL
- RHYS, MORGAN (1716 - 1779), circulating schoolmaster, and hymn-writer
- RHYS, MORGAN JOHN (Morgan ab Ioan Rhus; 1760 - 1804), Baptist minister, author, and American settler
- RHYS, THOMAS (1750/51 - 1828), rhymester - see RHYS, DAVID
- RHYS, WALTER FITZURYAN (1873 - 1956), nobleman and politician
- RHYS, WILLIAM JOSEPH (1880 - 1967), minister (B) and author
- RHYS-ROBERTS, THOMAS ESMOR RHYS (1910 - 1975), soldier and barrister
- RHYS-WILLIAMS, BRANDON MEREDITH (1927 - 1988), Conservative politician
- RHYS-WILLIAMS, Sir RHYS (1865 - 1955), first Baronet created 1918, and a judge
- RICE family Newton, Dynevor,
- RICE, OWEN (1719 - 1788)
- RICEMARCHUS - see RHYGYFARCH
- RICHARD ap JOHN (fl. 1578-1611) Scorlegan, Llangynhafal, gentleman, poet, patron of bards, and copyist
- RICHARD, EBENEZER (1781 - 1837), Calvinistic Methodist minister
- RICHARD, EDWARD (1714 - 1777), schoolmaster, scholar, and poet
- RICHARD, HENRY (1812 - 1888), politician
- RICHARD, JOB, schoolmaster - see WALTERS, DAVID EUROF
- RICHARD, JOHN (fl. 1743-1784), Calvinistic Methodist exhorter, and hymn-writer
- RICHARD(S), JOHN (1720 - 1764), Calvinistic Methodist exhorter, and poet
- RICHARD, JOHN - see RICHARDS, JOHN
- RICHARD, THOMAS (1783 - 1856), Calvinistic Methodist minister
- RICHARD, TIMOTHY (1845 - 1919), missionary in China
- RICHARDS family Coed, Caerynwch,
- RICHARDS, ALUN MORGAN (1929 - 2004), screenwriter, playwright, and author
- RICHARDS, DAVID (Dafydd Ionawr; 1751 - 1827), schoolmaster and poet
- RICHARDS, DAVID (1822 - 1900), musician
- RICHARDS, DAVID (1783 - 1826), vicar - see RICHARDS, THOMAS
- RICHARDS, DAVID MORGAN (1853 - 1913), journalist and eisteddfodwr