Her birth and death dates are guesses. The only thing that is known for sure is that she died on December 13, probably in the early 900s. Ref: Europäische Stammtafeln, one of the standard authorities on medieval lines.

For questions like this one, it's a good idea to check Leo van de Pas' website: http://www.genealogics.org/getperson.php?personID=I00201291&tree=LEO

Leo does original research, and also follows the discussions at soc.genealogy.medieval. The information in his database tends to be up-to-date, and also on the conservative. No wild speculations there.