Summary from Wikipedia

Paul Heyse was born on 15 March 1830 in Heiliggeiststraße, Berlin. His father, the distinguished philologist Karl Wilhelm Ludwig Heyse,[1] was a professor at the University of Berlin who had been the tutor of both Wilhelm von Humboldt's youngest son (during 1815–17) and Felix Mendelssohn (during 1819–27). His paternal grandfather Johann Christian August Heyse (21 April 1764, Nordhausen – 27 July 1829, Magdeburg), was a famous German grammarian and lexicographer. Paul Heyse's mother was Jewish.[2]