Pseudo-Hegesippus is the conventional name of the anonymous author of De excidio Hierosolymitano ("On the Destruction of Jerusalem"), a fourth-century Christian Latin adaptation of The Jewish War of Flavius Josephus.
A more probable explanation is that the work was mistaken for the lost history of the Greek Christian author Hegesippus, which was also composed in five books.
The work began to circulate about the time of the death of Ambrose, then Bishop of Milan, in 398, or shortly after.
lxxi), written between 386 and 400, may bear witness to this, although it is also possible that Jerome refers here to the literal Latin translation of War, which was probably extant by that time.
The various allusions, notably that to the defence of Britain by Count Theodosius (c. 368/9) are more readily explained if it is an earlier work.