Tiberius Claudius
His maternal grandparents were Tiberius Claudius Balbilus and his unnamed wife. Balbilus was an astrologer and a learned scholar, who was later Prefect of Egypt. Balbilus and his father, an Egyptian Greek grammarian and astrologer called Thrasyllus of Mendes or Tiberius Claudius Thrasyllus, were friends to some of the first Roman Emperors, including Tiberius, Claudius, and Vespasian.