- ROBIN CLIDRO (fl. 1580), itinerant minstrel
- ROBIN DDU (fl. c. 1450), poet
- ROBIN DDU ap SIENCYN BLEDRYDD - see ROBIN DDU
- ROBIN DDU EIFIONYDD - see ROBERTS, ELLIS
- ROBIN DDU ERYRI - see PARRY, ROBERT
- ROBIN DDU O FEIRION - see EDWARDS, ROBERT
- ROBIN DDU YR AIL O FÔN - see HUGHES, ROBERT
- ROBIN DYFI - see ROBERT DYFI
- ROBIN ERYRI - see STEPHEN, ROBERT
- ROBIN TELYNOR - see GRIFFITH, ROBERT
- ROBINSON family Conway, Monachdy, Gwersyllt,
- ROBINSON, GILBERT WOODING (1888 - 1950), professor of Agricultural Chemistry, world authority on soils
- ROBINSON, NICHOLAS (c. 1530 - 1585), bishop of Bangor - see ROBINSON
- ROBINSON, THEODORE HENRY (1881 - 1964), professor, scholar and author
- ROBYN DDU ERYRI - see PARRY, ROBERT
- ROCH, WALTER FRANCIS (1880 - 1965), politician and landowner
- ROCYN-JONES, Sir DAVID THOMAS (1862 - 1953), medical officer of health and a public figure
- RODERICK, DAVID (1746 - 1830), cleric and schoolmaster
- RODERICK, JOHN (1673 - 1735), grammarian, printer and publisher of almanacks and books, poet, and eisteddfodwr
- RODGERS, OWEN - see ROGERS, OWEN
- ROGER 'of CONWAY' (d. 1360), Franciscan friar
- ROGERS, DAVID (1783 - 1824), Wesleyan minister and author
- ROGERS, JOHN (d. 1738), bookseller and printer
- ROGERS, OWEN (c.1532 - c.1570), printer and bookseller
- ROGERS, RICHARD SAMUEL (1882 - 1950), minister (B), editor and writer
- ROGERS, ROLAND (1847 - 1927), musician
- ROLANT, DAFYDD - see ROWLAND, DAVID
- ROOS, WILLIAM (1808 - 1878), portrait painter and engraver
- ROOSE, LEIGH RICHMOND (1877 - 1916), Association football player
- ROSS, JOHN (1729? - 1807), printer and publisher
- ROTHERY, THOMAS - see THOMAS ap RHODRI
- ROULAND, DAVID - see ROWLAND DAVID
- ROWLAND(S), BENJAMIN (fl. 1722-1763), Methodist exhorter
- ROWLAND, DANIEL (1713 - 1790), Methodist cleric
- ROWLAND(S), DAVID (Dewi Brefi; 1782 - 1820), cleric
- ROWLAND, DAVID (1795 - 1862), eccentric Calvinistic Methodist minister
- ROWLAND (or ROULAND), DAVID (fl. 16th century), translator
- ROWLAND, ELIZABETH HELEN (1838 - 1910), author - see ROWLAND, THOMAS
- ROWLAND(S), ELLIS (1621 - 1691), early nonconformist
- ROWLAND, ELLIS (c. 1650 - c. 1730) Harlech, bard
- ROWLAND, HENRY (1551 - 1616), bishop of Bangor
- ROWLAND, JOHN (fl. 1760-1764), printer
- ROWLAND, JOHN (1816? - 1888), Unitarian writer
- ROWLAND, Sir JOHN (1877 - 1941), civil servant
- ROWLAND, JOHN - see ROWLANDS, JOHN
- ROWLAND, NATHANIEL (1749 - 1831), Methodist cleric
- ROWLAND, ROBERT DAVID (Anthropos; ?1853 - 1944), minister (CM), poet and writer
- ROWLAND, THOMAS (1824 - 1884), cleric and grammarian
- ROWLAND(S), WILLIAM (1887 - 1979), schoolmaster and author
- ROWLANDS, Sir ARCHIBALD (1892 - 1953), administrator