Namesakes
Ludwig van Beethoven
(m) 1770-1827 
Notable Musicians
Ludwig Wittgenstein
(m) 1889-1951
Notable Philosophers and Thinkers
Franz Ferdinand of Austria
(middle name Ludwig) (m) 1863-1914
Other Royalty 1863-1914 Austria-Hungary (archduke)
Ludwig I the Pious
(m) 778-840
German Kings and Holy Roman Emperors 813-840
Wilhelm I
(middle name Ludwig) (m) 1797-1888
Other Royalty 1861-1888; 1871-1888 Prussia; German Empire (king/emperor)
Roy Horn
(middle name Ludwig) (m) 1944-2020
Notable Actors and Entertainers (entertainer/magician)
Gustav Ludwig Hertz
(m) 1887-1975
Nobel Prize Winners 1925 (physics)
Notable Scientists and Inventors
Ludwig Boltzmann
(m) 1844-1906
Notable Scientists and Inventors
Ludwig Erhard
(m) 1897-1977
German Chancellors and Presidents 1963-1966 (chancellor)
Ludwig Mies van der Rohe
(m) 1886-1969
Notable Artists
Karel III
(middle name Ludwig) (m) 1887-1922
Bohemian Kings 1916-1918
Austrian Dukes and Emperors (Karl I) 1916-1918
Saints (Karl of Austria)
Hungarian Kings and Queens (Károly IV) 1916-1918
Ludwig IV
(m) 1282-1347
German Kings and Holy Roman Emperors 1314-1347
Ludwig II of Bavaria
(m) 1845-1886
Other Royalty 1864-1886 Bavaria (king)
Ludwig II the Younger
(m) 806-875
German Kings and Holy Roman Emperors 844-875
Otto of Greece
(middle name Ludwig) (m) 1815-1867
Other Royalty 1832-1862 Greece (king)
Ernst Ludwig Kirchner
(m) 1880-1938
Notable Artists
Carol I of Romania
(middle name Ludwig) (m) 1839-1914
Other Royalty 1881-1914 Romania (king)
Horst Ludwig Störmer
(m) 1949-
Nobel Prize Winners 1998 (physics)
Notable Scientists and Inventors
Ludwig Quidde
(m) 1858-1941
Nobel Prize Winners 1927 (peace)
Ludwig III the Child
(m) 893-911
German Kings and Holy Roman Emperors 900-911
Karl Ludwig of Austria
(m) 1833-1896
Other Royalty 1833-1896 Austria-Hungary (archduke)
Otto Franz Joseph of Austria
(middle name Ludwig) (m) 1865-1906
Other Royalty 1865-1906 Austria-Hungary (archduke)
Ludwig Augustinsson
(m) 1994-
Notable Athletes (soccer)
Ljudevit Gaj
(a.k.a. Ludwig) (m) 1809-1872
Notable Philosophers and Thinkers
Heinrich of Prussia
(middle name Ludwig) (m) 1726-1802
Other Royalty 1726-1802 Prussia (prince)
Ludwig Viktor of Austria
(m) 1842-1919
Other Royalty 1842-1919 Austria-Hungary (archduke)
Luz Long
(middle name Ludwig) (m) 1913-1943
Olympic Medalists 1936 long jump (silver)
Johan Ludwig Mowinckel
(m) 1870-1943
Norwegian Prime Ministers 1924-1926; 1928-1931; 1933-1935
Louis of Thuringia
(a.k.a. Ludwig) (m) 1200-1227
Saints
Louis Ferdinand of Prussia
(middle name Ludwig) (m) 1772-1806
Other Royalty 1772-1806 Prussia (prince)
Josef Ludwig von Armansperg
(m) 1787-1853
Greek Prime Ministers 1835-1837
Ludwig of Prussia
(m) 1773-1796
Other Royalty 1773-1796 Prussia (prince)
Ferdinand Karl of Austria
(middle name Ludwig) (m) 1868-1915
Other Royalty 1868-1911 Austria-Hungary (archduke)
Gustav Mie
(middle name Ludwig) (m) 1868-1957
Notable Scientists and Inventors
Maximilian Eugen of Austria
(middle name Ludwig) (m) 1895-1952
Other Royalty 1895-1919 Austria-Hungary (archduke)
Adolph Strecker
(middle name Ludwig) (m) 1822-1871
Notable Scientists and Inventors
Heinz Fütterer
(middle name Ludwig) (m) 1931-2019
Olympic Medalists 1956 4x100 m relay (bronze)
Friedrich of Prussia
(middle name Ludwig) (m) 1794-1863
Other Royalty 1794-1863 Prussia (prince)
Ludwig Wrede
(m) 1894-1965
Olympic Medalists 1928 figure skating (bronze)
Ludwig von Moos
(m) 1910-1990
Swiss Presidents 1964; 1969
Ludwig Forrer
(m) 1845-1921
Swiss Presidents 1906; 1912
Waldemar of Prussia
(middle name Ludwig) (m) 1889-1945
Other Royalty 1889-1945 Prussia (prince)
Rex Gildo
(a.k.a. Ludwig) (m) 1936-1999
Notable Musicians
Alexander of Prussia
(middle name Ludwig) (m) 1820-1896
Other Royalty 1820-1896 Prussia (prince)
Adolf Grimme
(middle name Ludwig) (m) 1889-1963
Notable Politicians and Statespeople
Ludwig von Strümpell
(m) 1812-1899
Notable Philosophers and Thinkers
Heinrich of Prussia
(middle name Ludwig) (m) 1900-1904
Other Royalty 1900-1904 Prussia (prince)
Karl Ludwig of Liechtenstein
(m) 2016-
Other Royalty 2016- Liechtenstein (prince)