Question: Who is the maternal grandfather of Gaius Antonius (Brother Of Mark Antony)?
Sentence (from "Gaius Antonius (brother of Mark Antony)"): Gaius Antonius (died 42 BC) was the second son of Marcus Antonius Creticus and Julia Antonia, and thus, younger brother of Mark Antony, who was one of the members of the second triumvirate.
Relevant evidence: Yes