Spes/Spur means illegitimate and isn't a name?
Spur is an abbreviation of the Latin word Spurius, which means illegitimate. It is not part of the name, but rather a designation. Often, it looks like Spes and follows the given name. This designation often follows the individual throughout their life and into the records of their children's lives.
It would be nice if those indexing German records were aware of this fact and refrain from indexing it as part of the name.