Question: Who is Giulio Cybo's paternal grandmother?
Answer: Maddalena de' Medici

Lorenzo Cybo Malaspina (20 July 1500 – 14 March 1549) was an Italian general, who was duke of Ferentillo. Born at Sampierdarena (in what is modern Genoa), he was the son of Franceschetto Cybo and Maddalena de' Medici, daughter of "Lorenzo de' Medici" and his uncle was Pope Leo X. His paternal grandfather was Pope Innocent VIII