After Vespasian became Emperor in 69 CE , he granted Josephus his freedom , at which time Josephus assumed the emperor 's family name of Flavius .
In response Vespasian decided to keep Josephus as a slave and interpreter .
After Vespasian became Emperor in 69 CE , Josephus granted Josephus Josephus ' freedom , at which Josephus Josephus assumed the emperor 's family name Josephus Flavius .
In response Vespasian decided to keep Josephus as a slave and interpreter .