Namesakes
Adam Johann von Krusenstern
(m) 1770-1846 
Notable Explorers and Adventurers
Adolf Butenandt
(middle name Johann) (m) 1903-1995
Nobel Prize Winners 1939 (chemistry)
Notable Scientists and Inventors
Adolf von Baeyer
(a.k.a. Johann) (m) 1835-1917
Nobel Prize Winners 1905 (chemistry)
Notable Scientists and Inventors
Aloys II, Prince of Liechtenstein
(middle name Johann) (m) 1796-1858
Other Royalty 1836-1858 Liechtenstein (prince)
Emil Frey
(middle name Johann) (m) 1838-1922
Swiss Presidents 1894
Eric Johnson
(middle name Johann) (m) 1979-
Notable Actors and Entertainers (actor)
Falco
(a.k.a. Johann) (m) 1957-1998
Notable Musicians
Ferdinand Karl of Austria
(middle name Johann) (m) 1868-1915
Other Royalty 1868-1911 Austria-Hungary (archduke)
Franz Joseph I, Prince of Liechtenstein
(middle name Johann) (m) 1726-1781
Other Royalty 1772-1781 Liechtenstein (prince)
Friedrich Schiller
(a.k.a. Johann) (m) 1759-1805
Notable Writers
Hans-Adam I, Prince of Liechtenstein
(a.k.a. Johann) (m) 1657-1712
Other Royalty 1684-1712 Liechtenstein (prince)
Hans Asperger
(m) 1906-1980
Notable Scientists and Inventors
Henry Fuseli
(a.k.a. Johann) (m) 1741-1825
Notable Artists
Johann Nepomuk Karl, Prince of Liechtenstein
(m) 1724-1748
Other Royalty 1732-1748 Liechtenstein (prince)
Johann I Joseph, Prince of Liechtenstein
(m) 1760-1836
Other Royalty 1805-1836 Liechtenstein (prince)
Johann Strauss I
(m) 1804-1849
Notable Musicians
Johann II, Prince of Liechtenstein
(m) 1840-1929
Other Royalty 1858-1929 Liechtenstein (prince)
Johann Sebastian Bach
(m) 1685-1750
Notable Musicians
Johann Christian Bach
(m) 1735-1782
Notable Musicians
Johann Blank
(m) 1904-1983
Olympic Medalists 1928 water polo (gold)
Johann Deisenhofer
(m) 1943-
Nobel Prize Winners 1988 (chemistry)
Johann Gottlieb Fichte
(m) 1762-1814
Notable Philosophers and Thinkers
Johann Wolfgang von Goethe
(m) 1749-1832
Notable Writers
Jóhann Berg Guðmundsson
(m) 1990-
Notable Athletes (soccer)
Jóhann Hafstein
(m) 1915-1980
Icelandic Presidents and Prime Ministers 1970-1971 (prime minister)
Johann Hari
(m) 1979-
Notable Journalists
Johann Adolph Hasse
(m) 1699-1783
Notable Musicians
Jóhann Jóhannsson
(m) 1969-2018
Notable Musicians
Johann Nepomuk
(m) 1777-1860
Saints
Johann Pachelbel
(m) 1653-1706
Notable Musicians
Johann Heinrich Pestalozzi
(m) 1746-1827
Notable Activists and Revolutionaries
Johann Adolf Scheibe
(m) 1708-1776
Notable Musicians
Johann Jakob Scherer
(m) 1825-1878
Swiss Presidents 1875
Johann Schneider-Ammann
(m) 1952-
Swiss Presidents 2016
Johann Schober
(m) 1874-1932
Austrian Chancellors and Presidents 1921-1922; 1922; 1929-1930 (chancellor)
Johann Strauss II
(m) 1825-1899
Notable Musicians
Johann Joachim Winckelmann
(m) 1717-1768
Notable Philosophers and Thinkers
Johnny Weissmuller
(m) 1904-1984
Notable Actors and Entertainers (actor)
Notable Athletes (swimming)
Olympic Medalists 1924; 1928 swimming - 100 m freestyle; swimming - 400 m freestyle; swimming - 4x200 m freestyle relay; water polo (gold/bronze)
Josef I
(middle name Johann) (m) 1678-1711
Bohemian Kings 1705-1711
Austrian Dukes and Emperors (Joseph I) 1705-1711
German Kings and Holy Roman Emperors (Joseph I) 1690-1711
Joseph Johann Adam, Prince of Liechtenstein
(m) 1690-1732
Other Royalty 1721-1732 Liechtenstein (prince)
József I
(middle name Johann) (m) 1678-1711
Hungarian Kings and Queens 1687-1711
Karel II
(middle name Johann) (m) 1685-1740
Bohemian Kings 1711-1740
Austrian Dukes and Emperors (Karl II) 1711-1740
German Kings and Holy Roman Emperors (Karl VI) 1711-1740
Karl Schenk
(a.k.a. Johann) (m) 1823-1895
Swiss Presidents 1865; 1871; 1874; 1878; 1885; 1893
Károly III
(middle name Johann) (m) 1685-1740
Hungarian Kings and Queens 1711-1740
Konrad of Parzham
(a.k.a. Johann) (m) 1818-1894
Saints
Kurt Schuschnigg
(middle name Johann) (m) 1897-1977
Austrian Chancellors and Presidents 1934-1938 (chancellor)
Leopold Mozart
(a.k.a. Johann) (m) 1719-1787
Notable Musicians
Lutz Graf Schwerin von Krosigk
(a.k.a. Johann) (m) 1887-1977
German Chancellors and Presidents 1945 (chancellor)
Michel Théato
(middle name Johann) (m) 1878-1919
Olympic Medalists 1900 marathon (gold)
Rainer Maria Rilke
(middle name Johann) (m) 1875-1926
Notable Writers
Stefán Jóhann Stefánsson
(m) 1894-1980
Icelandic Presidents and Prime Ministers 1947-1949 (prime minister)