Nope! Wikipedia to the rescue!
The Kent region is called Cantiaci on the game map (the regions are named for the local tribes, which in this case were the Cantiaci) and Canterbury was Durovernum, the one with the Civitates-run town up there. Rutupiae (RVTVPIAE) becomes someplace called Richborough Castle.
What a great way to nail down so much history.