Namesakes
Fictional Characters from Books:
1 character
Bernard Marx 1932 Brave New World 
German Chancellors and Presidents:
1 chancellor
(chancellor) Wilhelm Marx 1923-1925; 1926-1928
Notable Actors and Entertainers:
2 actors
Harpo Marx 1888-1964
Groucho Marx 1890-1977
Notable Musicians:
1 singer
Richard Marx 1963-
Notable Philosophers and Thinkers:
1 philosopher
Karl Marx 1818-1883