Titus Labienus
Orosius, in his "Seven Books of History Against the Pagans", calls him Labienus, confusing him with Caesar's legate Titus Labienus, who lived to fight against Caesar in the Civil War. The error was perpetuated by Bede and Geoffrey of Monmouth, both of whom refer to a tribune called Labienus being killed in Britain. The latter says he was killed by Nennius.