Question: Who is Livilla's maternal grandfather?
Sentence (from "Antonia Minor"): She was a niece of the Emperor Augustus, sister of Cleopatra Selene II, sister-in-law of the Emperor Tiberius, paternal grandmother of the Emperor Caligula and Empress Agrippina the Younger, mother of the Emperor Claudius, and both maternal great-grandmother and paternal great-aunt of the Emperor Nero.
Relevant evidence: No