Incest of unequal gravity: the "incestus iuris gentium," which was applied to both Romans and non-Romans in the Empire, and the "incestus iuris civilis," which concerned only Roman citizens. Therefore, for example, an Egyptian could marry an aunt, but a Roman could not. Despite the act of incest being unacceptable within the Roman Empire, Roman Emperor Caligula is rumored to have had sexual relationships with all three of his sisters (Julia Livilla, Drusilla, and Agrippina the Younger). Emperor Claudius, after executing his previous wife, married his brother's daughter Agrippina the Younger, and changed the law to allow an otherwise illegal union.
Agrippina the Elder the island of Pandateria, where she would remain until her death by starvation in AD 33. Following the Roman custom of parents and children sharing the same nomen and cognomen, women in the same family would often share the same name. Accordingly, Marcus Vipsanius Agrippa had many relatives who shared the name "Vipsania Agrippina". To distinguish Marcus Agrippa's daughter from his granddaughter, historians refer to his daughter as Latin "Agrippina Maior", literally "Agrippina the Elder". Likewise, Agrippina's daughter is referred to as "Agrippina Minor", literally "Agrippina the Younger". Like her father, Agrippina the Elder avoided her cognomen and was never