Namesakes
Austrian Chancellors and Presidents:
2 chancellors
(chancellor) Johann Schober 1921-1922; 1922; 1929-1930 
(chancellor) Kurt Schuschnigg (middle name Johann) 1934-1938
Austrian Dukes and Emperors:
2 archdukes
Archduke Joseph I (middle name Johann) 1705-1711
Archduke Karl II (middle name Johann) 1711-1740
Bohemian Kings:
2 kings
King Josef I (middle name Johann) 1705-1711
King Karel II (middle name Johann) 1711-1740
German Chancellors and Presidents:
1 chancellor
(chancellor) Lutz Graf Schwerin von Krosigk (a.k.a. Johann) 1945
German Kings and Holy Roman Emperors:
2 king-emperors
King-Emperor Joseph I (middle name Johann) 1690-1711
King-Emperor Karl VI (middle name Johann) 1711-1740
Hungarian Kings and Queens:
2 kings
King József I (middle name Johann) 1687-1711
King Károly III (middle name Johann) 1711-1740
Icelandic Presidents and Prime Ministers:
2 prime ministers
(prime minister) Stefán Jóhann Stefánsson 1947-1949
(prime minister) Jóhann Hafstein 1970-1971
Nobel Prize Winners:
3 chemistry
(chemistry) Adolf von Baeyer (a.k.a. Johann) 1905
(chemistry) Adolf Butenandt (middle name Johann) 1939
(chemistry) Johann Deisenhofer 1988
Notable Activists and Revolutionaries:
1 activist
(activist) Johann Heinrich Pestalozzi 1746-1827
Notable Actors and Entertainers:
2 actors
Johnny Weissmuller 1904-1984
Eric Johnson (middle name Johann) 1979-
Notable Artists:
1 painter
Henry Fuseli (a.k.a. Johann) 1741-1825
Notable Athletes:
1 soccer, 1 swimming
(swimming) Johnny Weissmuller 1904-1984
(soccer) Jóhann Berg Guðmundsson 1990-
Notable Explorers and Adventurers:
1 explorer
Adam Johann von Krusenstern 1770-1846
Notable Journalists:
1 journalist
(journalist) Johann Hari 1979-
Notable Musicians:
9 composers, 1 musician
Johann Pachelbel 1653-1706
Johann Sebastian Bach 1685-1750
Johann Adolph Hasse 1699-1783
Johann Adolf Scheibe 1708-1776
Leopold Mozart (a.k.a. Johann) 1719-1787
Johann Christian Bach 1735-1782
Johann Strauss I 1804-1849
Johann Strauss II 1825-1899
Falco (a.k.a. Johann) 1957-1998
Jóhann Jóhannsson 1969-2018
Notable Philosophers and Thinkers:
1 historian, 1 philosopher
Johann Joachim Winckelmann 1717-1768
Johann Gottlieb Fichte 1762-1814
Notable Scientists and Inventors:
2 chemists, 1 physician
Adolf von Baeyer (a.k.a. Johann) 1835-1917
Adolf Butenandt (middle name Johann) 1903-1995
Hans Asperger 1906-1980
Notable Writers:
1 author, 1 playwright, 1 poet/author
Johann Wolfgang von Goethe 1749-1832
Friedrich Schiller (a.k.a. Johann) 1759-1805
Rainer Maria Rilke (middle name Johann) 1875-1926
Olympic Medalists:
2 gold, 1 bronze/gold
(gold) Michel Théato (middle name Johann) 1900 marathon
(gold) Johann Blank 1928 water polo
(bronze/gold) Johnny Weissmuller 1924; 1928 swimming - 400 m freestyle; water polo; swimming - 100 m freestyle; swimming - 4x200 m freestyle relay
Other Royalty:
7 princes, 1 archduke
Hans-Adam I, Prince of Liechtenstein (a.k.a. Johann) 1684-1712 Liechtenstein
Joseph Johann Adam, Prince of Liechtenstein 1721-1732 Liechtenstein
Johann Nepomuk Karl, Prince of Liechtenstein 1732-1748 Liechtenstein
Franz Joseph I, Prince of Liechtenstein (middle name Johann) 1772-1781 Liechtenstein
Johann I Joseph, Prince of Liechtenstein 1805-1836 Liechtenstein
Aloys II, Prince of Liechtenstein (middle name Johann) 1836-1858 Liechtenstein
Johann II, Prince of Liechtenstein 1858-1929 Liechtenstein
Ferdinand Karl of Austria (middle name Johann) 1868-1911 Austria-Hungary
Saints:
1 blessed, 1 saint
Blessed Johann Nepomuk 1777-1860
Saint Konrad of Parzham (a.k.a. Johann) 1818-1894
Swiss Presidents:
4 presidents
Johann Jakob Scherer 1875
Karl Schenk (a.k.a. Johann) 1865; 1871; 1874; 1878; 1885; 1893
Emil Frey (middle name Johann) 1894
Johann Schneider-Ammann 2016