Tarquinius's father was Lucius Tarquinius Collatinus, who was the last king of Rome before the Republic. After Collatinus was killed, his fortune went to his son Lucius Tarquinius Priscus. Priscus later became the first king of Rome after the Republic was established.
Beyond the Legends: Unveiling the Reign of Lucius Tarquinius Priscus