I'd also assumed that the Hyperia name was a reference to the fact that the ancient goddess flew over water, and the ride is situated over the old log flume - but I'm not sure if this is just a coincidence, as it wasn't explicitly mentioned in the article.
I'm still disappointed that SW7 at Alton Towers was called "The Smiler" rather than "Delirium", as I personally preferred that name! (as with "Euphoria", it describes the sensation that riders ought to feel)
Also: it's interesting that Merlin wanted the Kremer Roll to be called the Burton Twist; if it had been named after John Wardley then maybe it would have been more appropriate, given his decades of service - but maybe it would have seemed a bit boastful to name it after somebody who is still relatively new in the industry?
Personally, I would have called it the "Chertsey Roll" (similar to the "Staffordshire Knot" on The Smiler), as it's promoting the region rather than a specific individual.