- MORGAN ap ATHRWYS - see MORGAN MWYNFAWR
- MORGAN ap CARADOG ap IESTYN (d. c. 1208), lord of the Welsh barony of Avan Wallia (or Nedd-Avan) in the honour of Glamorgan
- MORGAN ap HUW LEWYS (fl. c. 1550-1600), poet
- MORGAN ap HYWEL (fl. 1210-1248), Welsh lord of Gwynllwg or Caerleon
- MORGAN ELFAEL (fl. c. 1528-1541), poet
- MORGAN FYCHAN (d. 1288), lord of the Welsh barony of Avan Wallia (or Nedd-Afan) in the honour of Glamorgan
- MORGAN GAM (d. 1241), lord of the Welsh barony of Avan Wallia (or Nedd-Afan) in the honour of Glamorgan
- MORGAN HEN ab OWAIN (d. 975), king of Morgannwg
- MORGAN MWYNFAWR (fl. 730), king of Morgannwg
- MORGAN, ABEL (1673 - 1722), Baptist minister
- MORGAN, ALFRED PHILLIPS (1857 - 1942), musician
- MORGAN, ANN (d. 1687), landowner - see MORGAN, Sir CHARLES
- MORGAN, Sir CHARLES (1575? - 1643?), soldier
- MORGAN, CHARLES LANGBRIDGE (Menander; 1894 - 1958), drama critic, novelist, playwright
- MORGAN, CHARLES OCTAVIUS SWINNERTON (1803 - 1888), antiquary and local historian
- MORGAN, CLIFFORD (Cliff) ISAAC (1930 - 2013), rugby player, sports writer and broadcaster, media executive
- MORGAN, DAFYDD SIENCYN (1752 - 1844), musician
- MORGAN, DAVID (1779 - 1858), Independent minister and historian
- MORGAN, DAVID (1814 - 1883), religious revivalist
- MORGAN, DAVID EIRWYN (1918 - 1982), college principal and minister (B)
- MORGAN, DAVID JENKINS (1884 - 1949), teacher and agricultural officer
- MORGAN, DAVID LLOYD (1823 - 1892), naval surgeon
- MORGAN, DAVID THOMAS (c. 1695 - 1746), Jacobite
- MORGAN, DEWI (Dewi Teifi; 1877 - 1971), poet and journalist
- MORGAN, DYFNALLT (1917 - 1994), poet, literary critic and translator
- MORGAN, EDWARD (1783 - 1869), Evangelical cleric and author
- MORGAN, EDWARD (1817 - 1871), Calvinistic Methodist minister
- MORGAN, EDWARD (E.T.; 1880 - 1949), rugby player
- MORGAN, EDWARD (d. 1749), vicar - see MORGAN, JOHN
- MORGAN, ELAINE NEVILLE (1920 - 2013), screenwriter, journalist, and author
- MORGAN, ELENA PUW (1900 - 1973), novelist, author of fiction and short stories for children
- MORGAN, ELIZABETH (1705 - 1773), gardener
- MORGAN, ELUNED (1870 - 1938), writer and Patagonian colonist
- MORGAN, EVAN (1809 - 1853), Calvinistic Methodist minister and author
- MORGAN, EVAN (Llew Madog; 1846 - 1920), musician
- MORGAN, EVAN EDWARD (1855 - 1927), antiquary
- MORGAN, EVAN FREDERIC (2nd VISCOUNT TREDEGAR), (1893 - 1949), poet, artist, soldier, and statesman
- MORGAN, FRANCES ELIZABETH - see HOGGAN, FRANCES ELIZABETH
- MORGAN, FRANK ARTHUR (1844 - 1907)
- MORGAN, GEORGE CADOGAN (1754 - 1798), Arian minister and tutor, and scientist
- MORGAN, GEORGE OSBORNE (1826 - 1897), politician
- MORGAN, GRIFFITH (Guto Nyth-brân; 1700 - 1737), cross-country runner
- MORGAN, GWENLLIAN ELIZABETH FANNY (1852 - 1939), antiquary
- MORGAN, HECTOR DAVIES (1785 - 1850), cleric and theological writer
- MORGAN, HENRY (1635? - 1688), buccaneer
- MORGAN, HENRY (d. 1559), bishop
- MORGAN, HENRY ARTHUR (1830 - 1912), Master of Jesus College, Cambridge - see MORGAN, GEORGE OSBORNE
- MORGAN, HERBERT (1875 - 1946), minister (B), university lecturer, and director of extra-mural studies
- MORGAN, HYWEL RHODRI (1939 - 2017), politician
- MORGAN, IWAN JAMES (1904 - 1966), extra-mural tutor and politician