- MORGAN, JOHN (1688? - 1734?) Matchin, cleric, scholar, and author
- MORGAN, JOHN (1743 - 1801), cleric
- MORGAN, JOHN (1662 - 1701), cleric and author
- MORGAN, JOHN (1827 - 1903), cleric and author
- MORGAN, JOHN (1886 - 1957), Archbishop of Wales
- MORGAN, Sir JOHN (fl. 1688), soldier - see MORGAN, Sir THOMAS
- MORGAN, JOHN EDWARD (1828 - 1892), professor of medicine - see MORGAN, GEORGE OSBORNE
- MORGAN, JOHN JAMES (1870 - 1954), minister (Presb.) and author
- MORGAN, JOHN JENKYN (Glanberach; 1875 - 1961), local historian and essayist
- MORGAN, JOHN LLOYD (1861 - 1944), county court judge
- MORGAN, JOHN RHYS (Lleurwg; 1822 - 1900), Baptist minister, lecturer, poet, and littérateur
- MORGAN, JOSEPH BICKERTON (1859 - 1894), geologist and conchologist
- MORGAN(N), MAURICE (c. 1725 - 1802), Shakespearian commentator and political writer
- MORGAN, MAURICE - see MORGANN, MAURICE
- MORGAN, MORGAN PARRY (1876 - 1964), minister of religion (CM) and powerful preacher
- MORGAN, OWEN (Morien; 1836? - 1921), journalist and miscellaneous writer
- MORGAN, PHILIP (d. 1435), bishop of Worcester (1419) and of Ely (1426)
- MORGAN, REES (1764 - 1847), Calvinistic Methodist preacher
- MORGAN, RHYS (c. 1700 - c. 1775), poet
- MORGAN, RICHARD (1854 - 1939), schoolmaster and naturalist
- MORGAN, RICHARD (1743 - 1805), Independent minister
- MORGAN, RICHARD HUMPHREYS (1850 - 1899), Calvinistic Methodist minister and writer
- MORGAN, RICHARD WILLIAMS (Môr Meirion; c. 1815 - c. 1889), cleric and author
- MORGAN, ROBERT (1608 - 1673), bishop of Bangor
- MORGAN, ROBERT (1621 - 1710), Baptist minister
- MORGAN, THOMAS (1720 - 1799), Independent minister
- MORGAN, Sir THOMAS (1604 - 1679), soldier
- MORGAN, THOMAS (1543 - c. 1605), Roman Catholic conspirator
- MORGAN, THOMAS (Afanwyson; 1850 - 1939), Baptist minister, historian and littêrateur
- MORGAN, THOMAS (1737 - 1813), Unitarian minister
- MORGAN, THOMAS (1769 - 1851), navy chaplain
- MORGAN, Sir THOMAS (c. 1542 - 1595), soldier
- MORGAN, THOMAS (d. 1833), Wesleyan missionary and minister
- MORGAN, THOMAS (1752 - 1821), librarian - see MORGAN, THOMAS
- MORGAN, THOMAS JOHN (1907 - 1986), Welsh scholar and writer
- MORGAN, THOMAS OWEN (1799 - 1878), barrister-at-law and author
- MORGAN, THOMAS REES (1834 - 1897), mechanical engineer and manufacturer, and inventor
- MORGAN, TREFOR RICHARD (1914 - 1970), company director
- MORGAN, WALTER (fl. 1695), author
- MORGAN, Sir WALTER VAUGHAN (1831 - 1916), lord mayor of London
- MORGAN, WILLIAM (JOHN) (Penfro; 1846 - 1918), cleric, eisteddfodwr, and hymn-writer
- MORGAN, WILLIAM (c. 1545 - 1604), bishop, and translator of the Bible into Welsh
- MORGAN, WILLIAM (1801 - 1872), Baptist minister
- MORGAN, WILLIAM (1623 - 1689), Jesuit
- MORGAN, WILLIAM (Gwilym Gelli-deg; 1808 - 1878), poet
- MORGAN, Sir WILLIAM (d. 1584), soldier of fortune
- MORGAN, WILLIAM (1818 - 1884), Congregational minister and college tutor
- MORGAN, WILLIAM (Y Bardd; 1819 - 1878), poet
- MORGAN, WILLIAM (1750 - 1833), actuary and scientist
- MORGAN, WILLIAM (1750 - 1833), actuary