Given Nero was Roman, his name will presumably be from the Latin. If the Greek version of the spelling differs, then 666 surely must be in error.
Unless they meant that the number of the beast is Nero's name when you attempt to write it in Greek, though that seems something of a stretch, even for numerology afficionados.
Unless they meant that the number of the beast is Nero's name when you attempt to write it in Greek, though that seems something of a stretch, even for numerology afficionados.