Namesakes
Austrian Chancellors and Presidents:
1 president
(president) Wilhelm Miklas 1928-1938 
Danish Prime Ministers:
1 prime minister
Adam Wilhelm Moltke 1848-1852
Dutch Prime Ministers:
1 prime minister
Pieter Cort van der Linden (a.k.a. Wilhelm) 1913-1918
Finnish Presidents and Prime Ministers:
1 prime minister
(prime minister) Jukka Rangell (a.k.a. Wilhelm) 1941-1943
German Chancellors and Presidents:
4 chancellors, 1 president
(chancellor) Maximilian of Baden (a.k.a. Wilhelm) 1918
(chancellor) Wilhelm Cuno 1922-1923
(chancellor) Wilhelm Marx 1923-1925; 1926-1928
(chancellor) Ludwig Erhard (a.k.a. Wilhelm) 1963-1966
(president) Christian Wulff (a.k.a. Wilhelm) 2010-2012
Nobel Prize Winners:
3 chemistry, 2 physics
(physics) Wilhelm Röntgen 1901
(chemistry) Adolf von Baeyer (a.k.a. Wilhelm) 1905
(chemistry) Wilhelm Ostwald 1909
(physics) Wilhelm Wien 1911
(chemistry) Arne Tiselius (a.k.a. Wilhelm) 1948
Notable Actors and Entertainers:
1 actor
Anton Walbrook (a.k.a. Wilhelm) 1896-1967
Notable Artists:
1 painter, 1 photographer, 1 sculptor
Wilhelm von Gloeden 1856-1931
Jean Arp (a.k.a. Wilhelm) 1886-1966
Otto Dix (a.k.a. Wilhelm) 1891-1969
Notable Athletes:
1 chess, 1 rugby
(chess) Wilhelm Steinitz 1836-1900
(rugby) Bismarck du Plessis (a.k.a. Wilhelm) 1984-
Notable Businesspeople:
1 businessperson
Gustav Wilhelm Wolff 1834-1913
Notable Filmmakers:
2 directors
F. W. Murnau (a.k.a. Wilhelm) 1888-1931
Wim Wenders 1945-
Notable Musicians:
1 composer, 1 composer/musician
Richard Wagner (a.k.a. Wilhelm) 1813-1883
Adolf Busch (a.k.a. Wilhelm) 1891-1952
Notable Philosophers and Thinkers:
2 psychologists, 1 mathematician/philosopher, 1 philosopher
Gottfried Wilhelm Leibniz 1646-1716
Georg Wilhelm Friedrich Hegel 1770-1831
Wilhelm Wundt 1832-1920
Wilhelm Reich 1897-1957
Notable Politicians and Statespeople:
2 politicians
Gaius de Gaay Fortman (a.k.a. Wilhelm) 1911-1997
Norbert Schmelzer (a.k.a. Wilhelm) 1921-2008
Notable Scientists and Inventors:
5 chemists, 5 physicists, 1 anthropologist, 1 inventor, 1 physician
Gottfried Wilhelm Leibniz 1646-1716
Carl Wilhelm Scheele 1742-1786
Wilhelm Eduard Weber 1804-1891
Hermann Kolbe (a.k.a. Wilhelm) 1818-1884
Adolf Bastian (a.k.a. Wilhelm) 1826-1905
Adolf von Baeyer (a.k.a. Wilhelm) 1835-1917
Wilhelm Röntgen 1845-1923
Wilhelm Maybach 1846-1929
Wilhelm Ostwald 1853-1932
Emil Kraepelin (a.k.a. Wilhelm) 1856-1926
Wilhelm Wien 1864-1928
Gustav Mie (a.k.a. Wilhelm) 1868-1957
Arne Tiselius (a.k.a. Wilhelm) 1902-1971
Notable Writers:
2 author/poets, 1 author
Wilhelm Grimm 1786-1859
Rainer Maria Rilke (a.k.a. Wilhelm) 1875-1926
Hans Andreus (a.k.a. Wilhelm) 1926-1977
Olympic Medalists:
3 silver, 2 bronze, 1 gold/silver
(silver) Wilhelm Lützow 1912 swimming - 200 m breaststroke
(silver) Erik Wilén (a.k.a. Wilhelm) 1924 400 m hurdles
(silver) Willy Schärer 1924 1500 m
(gold/silver) Ville Pörhölä 1920; 1932 shot put; hammer throw
(bronze) Wilhelm Leichum 1936 4x100 m relay
(bronze) Friedrich Wilhelm Braun 1964 basketball
Other Royalty:
13 princes, 2 emperor/kings, 1 grand duke, 1 king, 1 king/emperor, 1 prince consort
Friedrich Wilhelm I 1713-1740 Prussia
Heinrich of Prussia (a.k.a. Wilhelm) 1862-1929 Prussia
Wilhelm I 1861-1888; 1871-1888 Prussia; German Empire
Wilhelm of Prussia 1882-1918; 1882-1951 German Empire; Prussia
Eitel Friedrich of Prussia (a.k.a. Wilhelm) 1883-1942 Prussia
August Wilhelm of Prussia 1887-1949 Prussia
Friedrich III (a.k.a. Wilhelm) 1888 German Empire; Prussia
Wilhelm II 1888-1918 German Empire; Prussia
Waldemar of Prussia (a.k.a. Wilhelm) 1889-1945 Prussia
Adolphe, Grand Duke of Luxembourg (a.k.a. Wilhelm) 1890-1905 Luxembourg
Sigismund of Prussia (a.k.a. Wilhelm) 1896-1978 Prussia
Wilhelm of Prussia 1906-1940 Prussia
Hubertus of Prussia (a.k.a. Wilhelm) 1909-1950 Prussia
Friedrich of Prussia (a.k.a. Wilhelm) 1911-1966 Prussia
Alexander Ferdinand of Prussia (a.k.a. Wilhelm) 1912-1985 Prussia
Karl Franz of Prussia (a.k.a. Wilhelm) 1916-1975 Prussia
Franz Wilhelm of Prussia 1943- Prussia
Alexander of Liechtenstein (a.k.a. Wilhelm) 1972- Liechtenstein
Claus of the Netherlands (a.k.a. Wilhelm) 1980-2002 Netherlands
Saints:
1 blessed
Blessed William of Hirsau (a.k.a. Wilhelm) ?-1091
Swedish Kings and Queens:
1 king
King Gustaf VI Adolf (a.k.a. Wilhelm) 1950-1973
Swiss Presidents:
3 presidents
Wilhelm Matthias Naeff 1853
Wilhelm Hertenstein 1888
Adolf Deucher (a.k.a. Wilhelm) 1886; 1897; 1903; 1909