"Black Panther" composer Göransson, who shares his first name with another famous composer (6)
I believe the answer is:
ludwig
(Other definitions for ludwig that I've seen before include "-- von Beethoven" , "- Wittgenstein, philosopher" , "Mad king of Bavaria" , "Great German composer . . . . . . van Beethoven" , "Name shared by Beethoven, Wittgenstein" .)