Thrasyllus of Mendes

Thrasyllus of Mendes (; ), also known as Thrasyllus of Alexandria and by his Roman name Tiberius Claudius Thrasyllus (fl. second half of the 1st century BC and first half of the 1st century – died 36, ), was a Greek Egyptian grammarian and literary commentator. Thrasyllus was an astrologer and a personal friend of the Roman emperor Tiberius, who favored Tiberius’ great-nephew Caligula, who was having an affair with his granddaughter, Ennia Thrasylla. He had two known children:

an unnamed daughter who married the Eques Lucius Ennius. from 69 until 79

a son called Tiberius Claudius Balbilus,