Lyonel Feininger (1871–1956), German-American painter and caricaturist
Karl Feininger (1844-1922), German-American musician, father of Lyonel
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Andreas Feininger (1906-1999), French-born, American photographer, son of Lyonel, educated at the Bauhaus as an architect
The film also highlights Praetorius's close friend and confidant, physics professor Lyonel Barker (Slezak), who plays bass viol in the student/faculty orchestra conducted by Praetorius.