Constans II
According to Theophanes the Confessor, Germanus was a son of patrician Justinian, who was executed in 668. Justinian was reportedly involved in the murder of Constans II and usurpation of the throne by Mezezius. Constantine IV, son of Constans II, defeated his rival and punished the supporters of Mezezius. Germanus survived the persecutions, but was made a eunuch by the victors.