- Karl [kahrl] /kɑrl/, 1871–1919, German socialist leader.
- his fatherWil·helm [vil-helm] /ˈvɪl hɛlm/, 1826–1900, German journalist and political leader.
- Karl (karl). 1871–1919, German socialist leader: with Rosa Luxemburg he led an unsuccessful Communist revolt (1919) and was assassinated
- his father, Wilhelm (ˈvɪlhɛlm). 1826–1900, German socialist leader and journalist, a founder (1869) of what was to become (1891) the German Social Democratic Party