Namesakes
Austrian Dukes and Emperors:
4 dukes, 1 archduke
Duke Friedrich I the Catholic 1195-1198 
Duke Friedrich II the Quarrelsome 1230-1246
Duke Friedrich I the Fair 1308-1330
Duke Friedrich II 1339-1344
Archduke Friedrich III 1457-1493
Estonian Presidents and Prime Ministers:
1 state elder
(state elder) Friedrich Akel 1924
Fictional Characters from Books:
1 character
Friedrich Bhaer 1869 Little Women
German Chancellors and Presidents:
2 chancellors, 1 chancellor/president
(chancellor) Georg von Hertling (middle name Friedrich) 1917-1918
(chancellor) Maximilian of Baden (middle name Friedrich) 1918
(chancellor/president) Friedrich Ebert 1918-1919; 1919-1925
German Kings and Holy Roman Emperors:
3 king-emperors
King-Emperor Friedrich I Barbarossa 1152-1190
King-Emperor Friedrich II 1212-1250
King-Emperor Friedrich III 1440-1493
Nobel Prize Winners:
3 chemistry, 1 economics
(chemistry) Adolf von Baeyer (middle name Friedrich) 1905
(chemistry) Friedrich Bergius 1931
(chemistry) Adolf Butenandt (middle name Friedrich) 1939
(economics) Friedrich Hayek 1974
Notable Actors and Entertainers:
1 actor
Gustav Knuth (middle name Friedrich) 1901-1987
Notable Artists:
2 painters, 1 drawer/painter
Friedrich von Amerling 1803-1887
Adolph von Menzel (middle name Friedrich) 1815-1905
Ad Reinhardt (middle name Friedrich) 1913-1967
Notable Athletes:
1 soccer
(soccer) Fritz Walter 1920-2002
Notable Businesspeople:
1 businessperson
Carl Benz (middle name Friedrich) 1844-1929
Notable Filmmakers:
2 directors
F. W. Murnau (a.k.a. Friedrich) 1888-1931
Fritz Lang 1890-1976
Notable Military Figures:
1 commander
Friedrich II the Great 1712-1786
Notable Musicians:
2 singers, 1 composer, 1 musician
Georg Friedrich Händel 1685-1759
Reinhard Mey (middle name Friedrich) 1942-
Fritz Hilpert 1956-
Patrick Lindner (a.k.a. Friedrich) 1960-
Notable Philosophers and Thinkers:
3 philosophers, 1 economist, 1 mathematician, 1 philologist
Georg Wilhelm Friedrich Hegel 1770-1831
Carl Friedrich Gauss 1777-1855
Friedrich Engels 1820-1895
Max Müller (a.k.a. Friedrich) 1823-1900
Friedrich Nietzsche 1844-1900
Friedrich Hayek 1899-1992
Notable Politicians and Statespeople:
1 politician
Gaius de Gaay Fortman (middle name Friedrich) 1911-1997
Notable Scientists and Inventors:
6 chemists, 1 astronomer, 1 inventor, 1 naturalist, 1 physician, 1 physicist
Otto Friedrich Müller 1730-1784
Carl Friedrich Gauss 1777-1855
Friedrich Bessel 1784-1846
Friedrich Wöhler 1800-1882
Adolph Strecker (middle name Friedrich) 1822-1871
Adolf von Baeyer (middle name Friedrich) 1835-1917
Carl Benz (middle name Friedrich) 1844-1929
Friedrich Bergius 1884-1949
Friedrich Paneth 1887-1958
Adolf Butenandt (middle name Friedrich) 1903-1995
Hans Asperger (middle name Friedrich) 1906-1980
Notable Writers:
4 poets, 2 playwrights, 1 author
Friedrich Schiller 1759-1805
Friedrich Hölderlin 1770-1843
Friedrich Schlegel 1772-1829
Georg Philipp Friedrich von Hardenberg "Novalis" 1772-1801
Adolf Friedrich von Schack 1815-1894
Friedrich Dürrenmatt 1921-1990
Hoimar von Ditfurth (middle name Friedrich) 1921-1989
Olympic Medalists:
4 bronze, 1 bronze/silver, 1 silver
(bronze) Frigyes Mezei (a.k.a. Friedrich) 1908 medley relay
(bronze) Marquardt Slevogt (a.k.a. Friedrich) 1932 ice hockey
(silver) Friedrich Hendrix 1932 4x100 m relay
(bronze) Friedrich von Stülpnagel 1936 4x400 m relay
(bronze/silver) Karl-Friedrich Haas 1952; 1956 4x400 m relay; 400 m
(bronze) Friedrich Wilhelm Braun 1964 basketball
Other Royalty:
31 princes, 5 kings, 2 emperor/kings, 2 prince consorts, 1 grand duke, 1 king/emperor
Friedrich Wilhelm I 1713-1740 Prussia
Heinrich of Prussia (a.k.a. Friedrich) 1726-1802 Prussia
Friedrich II the Great 1740-1786 Prussia
Heinrich of Prussia (a.k.a. Friedrich) 1747-1767 Prussia
Louis Ferdinand of Prussia (a.k.a. Friedrich) 1772-1806 Prussia
Ludwig of Prussia (a.k.a. Friedrich) 1773-1796 Prussia
August of Prussia (a.k.a. Friedrich) 1779-1843 Prussia
Heinrich of Prussia (a.k.a. Friedrich) 1781-1846 Prussia
Wilhelm of Prussia (a.k.a. Friedrich) 1783-1851 Prussia
Friedrich Wilhelm II of Prussia 1786-1797 Prussia
Friedrich of Prussia 1794-1863 Prussia
Friedrich Wilhelm III of Prussia 1797-1840 Prussia
Carl of Prussia (a.k.a. Friedrich) 1801-1883 Prussia
Albrecht of Prussia (a.k.a. Friedrich) 1809-1872 Prussia
Waldemar of Prussia (a.k.a. Friedrich) 1817-1849 Prussia
Alexander of Prussia (a.k.a. Friedrich) 1820-1896 Prussia
Georg of Prussia (a.k.a. Friedrich) 1826-1902 Prussia
Friedrich Karl of Prussia 1828-1885 Prussia
Albrecht of Prussia (a.k.a. Friedrich) 1837-1906 Prussia
Friedrich Wilhelm IV of Prussia 1840-1861 Prussia
Sigismund of Prussia (middle name Friedrich) 1864-1866 Prussia
Friedrich Leopold of Prussia 1865-1931 Prussia
Waldemar of Prussia (middle name Friedrich) 1868-1879 Prussia
Wilhelm I (middle name Friedrich) 1861-1888; 1871-1888 Prussia; German Empire
Friedrich Heinrich of Prussia 1874-1940 Prussia
Joachim Albrecht of Prussia (middle name Friedrich) 1876-1939 Prussia
Friedrich Wilhelm of Prussia 1880-1925 Prussia
Wilhelm of Prussia (a.k.a. Friedrich) 1882-1918; 1882-1951 German Empire; Prussia
Eitel Friedrich of Prussia 1883-1942 Prussia
Friedrich III 1888 German Empire; Prussia
Wilhelm II (a.k.a. Friedrich) 1888-1918 German Empire; Prussia
Waldemar of Prussia (middle name Friedrich) 1889-1945 Prussia
Adolphe, Grand Duke of Luxembourg (middle name Friedrich) 1890-1905 Luxembourg
Friedrich Sigismund of Prussia 1891-1927 Prussia
Friedrich Karl of Prussia 1893-1917 Prussia
Friedrich Leopold of Prussia 1895-1959 Prussia
Heinrich of Prussia (middle name Friedrich) 1900-1904 Prussia
Wilhelm of Prussia (middle name Friedrich) 1906-1940 Prussia
Friedrich of Prussia 1911-1966 Prussia
Karl Franz of Prussia (middle name Friedrich) 1916-1975 Prussia
Bernhard of Lippe-Biesterfeld (middle name Friedrich) 1948-1980 Netherlands
Claus of the Netherlands (middle name Friedrich) 1980-2002 Netherlands
Swedish Kings and Queens:
2 kings
King Fredrik I (a.k.a. Friedrich) 1720-1751
King Adolf Fredrik (middle name Friedrich) 1751-1771
Swiss Presidents:
4 presidents
Friedrich Frey-Herosé 1854; 1860
Emil Welti (a.k.a. Friedrich) 1869; 1872; 1876; 1880; 1884; 1891
Wilhelm Hertenstein (middle name Friedrich) 1888
Friedrich Traugott Wahlen 1961