Thrasyllus of Mendes

Thrasyllus of Mendes, also known as Thrasyllus of Alexandria and by his Roman name Tiberius Claudius Thrasyllus, was a Greek Egyptian grammarian and literary commentator. Thrasyllus was an astrologer and a personal friend of the Roman emperor Tiberius, as mentioned in the Annals by Tacitus and The Twelve Caesars by Suetonius.