Snorri did write Edda, but it was one book. Academics in the 1600s had a theory that its quotes came from another, singular, book and jumped on what came to be known as the "poetic Edda" when it was found. This turned out not to be the case, however, the name had already caught on.
https://www.beliebte-vornamen.de/11545-edda.htm
https://www.behindthename.com/name/edda-2/top/germany-berlin
https://de.m.wiktionary.org/wiki/Edda
https://en.m.wiktionary.org/wiki/Edda#German
https://de.m.wikipedia.org/wiki/Edda_(Vorname)