If you think it has a Latin name that I've missed, what's it called? If you think it doesn't have a (known) Latin name, what might be a good name for someone in 197AD to use for it?
(The word Fishbourne sounds and looks Saxon. So It Will Not Do. It is Just Wrong. I know that Chichester is the rather magnificent Noviomagus Regnensium, but I need a separate name for the Palace.)