- CHARLES, BERTIE GEORGE (1908 - 2000), scholar and archivist
- CHARLES, DAVID (1812 - 1878), Calvinistic Methodist minister
- CHARLES, DAVID (1762 - 1834), Calvinistic Methodist minister, and hymn-writer
- CHARLES, DAVID (1803 - 1880), Calvinistic Methodist minister and hymnist
- CHARLES, EDWARD (Siamas Gwynedd; 1757 - 1828), writer
- CHARLES, GEOFF - see CHARLES, GEOFFREY
- CHARLES, GEOFFREY (1909 - 2002), photographer
- CHARLES, HENRY (1778 - 1840), theologian, littérateur, and mathematician
- CHARLES, JAMES (1846 - 1920), Independent minister and theologian
- CHARLES, JAMES (1851 - 1906), painter
- CHARLES, JOHN ALWYN (1924 - 1977), minister (Cong.) and college lecturer
- CHARLES, PHILIP (1721? - 1790), Presbyterian minister
- CHARLES, THOMAS (1755 - 1814), Methodist cleric
- CHARLES, THOMAS (1811 - 1873), physician - see CHARLES, DAVID, III
- CHARLES, WILLIAM JOHN (1931 - 2004), footballer
- CHARLTON, - see CHERLETON
- CHERLETON family
- CHEVALIER LLOYD - see LLOYD, JACOB YOUDE WILLIAM
- CHIDLAW, BENJAMIN WILLIAM (1811 - 1892)
- CHRISTINA
- CHRISTOPHER, JACOB (fl. 1655-90), Independent preacher
- CHRISTY - see DAVIES, DAVID CHRISTOPHER
- CHURCHEY, WALTER (1747 - 1805), attorney and versifier
- CHURCHEY, WALTER (fl. 1814-1840), town clerk of Brecon - see CHURCHEY, WALTER
- CILCENNIN, Viscount - see THOMAS, JAMES PURDON LEWES
- CLARE family
- CLARE, RICHARD (d. 1176), conqueror of Ireland - see CLARE
- CLARK family, printers and publishers
- CLARK, GEORGE THOMAS (1809 - 1898), engineer and antiquary
- CLAUGHTON, Baron EVANS of - see EVANS, DAVID THOMAS GRUFFYDD
- CLAY, JOHN CHARLES (1898 - 1973), cricketer
- CLEDLYN - see DAVIES, DAVID REES
- CLEDWYN of PENRHOS, Baron - see HUGHES, CLEDWYN
- CLEMENTS, CHARLES HENRY (1898 - 1983), musician
- CLENOCKE, MAURICE (c.1525 - 1581), Roman Catholic theologian - see CLYNNOG, MORYS
- CLIVE, HENRIETTA ANTONIA (1758 - 1830), traveller and scientific collector
- CLOCH ARIAN TONYREFAIL - see EVANS, WILLIAM
- CLOUGH family Plas Clough, Glan-y-wern, Bathafarn, Hafodunos,
- CLOUGH, Sir RICHARD (d. 1570), merchant, and (for a period) 'factor' for Sir Thomas Gresham in Antwerp
- CLWYD of ABERGELE, Baron - see ROBERTS, JOHN HERBERT
- CLWYDFARDD - see GRIFFITH, DAVID
- CLWYDFRO - see WILLIAMS, THOMAS
- CLWYDWENFRO - see JAMES, JOHN LLOYD
- CLYDOG (fl. 500?), saint and martyr
- CLYNNOG, MORGAN (1558 - after 1619), seminary priest
- CLYNNOG, MORYS (c. 1525 - 1581), Roman Catholic theologian
- CNEPPYN GWERTHRYNIAWN - see SYPYN CYFEILIOG II
- CNEPPYN GWERTHRYNION (fl. 13th century), poet and grammarian
- COBB, JOSEPH RICHARD (1821 - 1897), antiquary
- COBDEN, CATHERINE ANNE - see WILLIAMS, HUGH