One of the three main characters in VN's novel Pale Fire (1962), Jakob Gradus (Shade's murderer) is a member of the Shadows (a regicidal organization). In his Commentary to Shade’s poem Kinbote (who imagines that he is Charles the Beloved, the last self-exiled king of Zembla) mockingly calls Gradus (who contended that the real origin of his name should be sought in the Russian word for grape, vinograd, to which a Latin suffix had adhered, making it Vinogradus) “Leningradus:”