What's in a name? That which we call a rose
By any other name would smell as sweet.
The PLT group changed the name of their implementation to “Racket” in 2010. Here is the relative number of searches for “Racket” compared with other names:
The general downward trend is an artifact of there being a growing number of non-tech people on the web. Note the seasonal swings. The number of searches increases at the beginning of the term.