- HARRIS, ANNE (1746 - 1748/9) - see HARRIS, HOWELL
- HARRIS, ELIZABETH (1748 - 1826) - see HARRIS, HOWELL
- HARRIS, GRIFFITH (1811 - 1892), musician
- HARRIS, HOWEL - see HARRIS, HOWELL
- HARRIS, HOWELL (1714 - 1773), religious reformer
- HARRIS, HYWEL - see HARRIS, HOWELL
- HARRIS, JOHN (1704 - 1763) S. Kennox, Llawhaden, Methodist and Moravian exhorter
- HARRIS, JOHN (d. 1680), bishop of Llandaff
- HARRIS, JOHN - see HARRIES, JOHN
- HARRIS, JOHN RYLAND (Ieuan Ddu; 1802 - 1823), printer and author
- HARRIS, JOSEPH (1704 - 1764), Assay-master at the Mint
- HARRIS, JOSEPH (Gomer; 1773 - 1825), Baptist minister, and man of letters
- HARRIS, SOLOMON (1726 - 1785), Arian minister and Academy tutor
- HARRIS, THOMAS (1705 - 1782)
- HARRIS, WILLIAM HENRY (1884 - 1956), priest, Professor of Welsh, St. David's College, Lampeter
- HARRISON, RICHARD (1743 - 1830), Wesleyan Methodist local preacher
- HARRY, GEORGE OWEN (c. 1553 - c. 1614), antiquary
- HARRY, JOHN - see HARRIES, JOHN
- HARRY, , minister - see HARRY, MILES
- HARRY, JOSEPH (1863 - 1950), schoolmaster and Independent minister
- HARRY, MILES (1700 - 1776), Baptist minister
- HARRY, NUN MORGAN (1800 - 1842), Independent minister
- HARRY, WILLIAM - see HARRI, WILLIAM
- HART, EMMA (1765 - 1815) - see GREVILLE, CHARLES FRANCIS
- HARTLAND, EDWIN SIDNEY (1848 - 1927), one of the founders of the modern science of folklore
- HARTMANN, EDWARD GEORGE (1912 - 1995), historian and promoter of Welsh-American relations
- HARTSHORN, VERNON (1872 - 1931), Labour leader, M.P., and Cabinet Minister
- HASSALL, CHARLES (1754 - 1814), land agent and surveyor
- HATTON, ANN JULIA (Ann of Swansea; 1764 - 1838), poet and novelist
- HAVARD, WILLIAM THOMAS (1889 - 1956), bishop
- HAWISE GADARN - see HAWYS GADARN
- HAWYS (HAWISE) GADARN (1291 - ante 1353), baroness of Powys
- HAYCOCK, BLODWEN MYFANWY (1913 - 1963), artist and author
- HAYDEN, HENRY SAMUEL (1805 - 1860), organist
- HAYWARD, ISAAC JAMES (1884 - 1976), miner, trade unionist and local politician
- HEATH, CHARLES (1761 - 1830), printer
- HEDD WYN - see EVANS, ELLIS HUMPHREY
- HEILIN FARDD - see HYWEL HEILIN
- HEILYN, ROWLAND - see HEYLIN, ROWLAND
- HELEN ELWY (1838 - 1910), author - see ROWLAND, THOMAS
- HELEN o FÔN - see ROWLANDS, JANE HELEN
- HEMAN GWENT - see EVANS, EDWARD
- HEMANS, FELICIA DOROTHEA (1793 - 1835), poet
- HEMP, WILFRID JAMES (1882 - 1962), archaeologist
- HEN BROFFWYD, YR - see JONES, EDMUND
- HENEAGE, ALGERNON WALKER - see WALKER-HENEAGE-VIVIAN, ALGERNON
- HENRY ab ARTHEN (d. 1163), scholar - see SULIEN
- BERRY, HENRY SEYMOUR (1877 - 1928) - see BERRY
- HENRY TUDOR - see HENRY VII
- HENRY (1457 - 1509), king of England