Class name: Transformer vs Transformation

Got a silly question:

Let's say I have an object ItemProvider. It fetches and returns the initial record array. Then I "wrap" it with "decorators" (decorator pattern) which transform, recalculate some properties of each item of the array.

This pattern is very convenient in my use case. I was wondering how would you call these decorators? Transformer or Transformation? The classes have explicit name, but I want to put them under a namespace (e.g. Transformer\ValidationFilter) and refer to them elsewhere using this name.

In math you apply a transformation to a given matrix. However, it would sound logical that a transformer applies the transformation. Also, Transformer sounds a bit silly :)

I think you guys know that naming things well is half the work :)

These are some of the decorators:

ProductArray\Transformer\PricePatcher
ProductArray\Transformer\ReferenceFilter
ProductArray\Transformer\ValidationFilter
ProductArray\Transformer\PriceCalculator