Flower with four swirls pattern is called Serenity d506

An unusual pattern, as the four swirls are not uniform, with a genuine ironestone backstamp. I find these plates very frustrating. I wonder why some patterns were named and others not? Perhaps the artists came up with the pattern, but no-one could agree on a name for it.

This pattern is called Serenity d506 thanks to the Portage Museum.
The dinner plate has three centre flowers and there are 6 swirls around it.