Drax was a project by Thomas P. Heckmann named after a character in the Silver Surfer comics. The releases were sequentially numbered and partially added "Ltd." to the release as well. These numbers are not part of the project name, but rather the names of the releases (as confirmed by Thomas P. Heckmann). This caused a lot of confusion when tracks by Drax appeared on compilations or on remix-releases. Read more on Last.fm