Question: Who is the paternal grandfather of Arruns Tarquinius (Son Of Tarquin The Proud)?
Sentence (from "Lucius Tarquinius Superbus"): Tarquin was said to have been the son or grandson of Lucius Tarquinius Priscus, the fifth king of Rome, and to have gained the throne through the murders of both his wife and his elder brother, followed by the assassination of his predecessor, Servius Tullius.
Relevant evidence: Yes