Frederuna von Ringelheim - Two Frederuna von Ringlheims

Robert Paul Van Natta says

I am contacting you about this profile: Frederuna Billung von Ambergau

My concern is that there is another Frederuna von Ringlheim page at
https://www.geni.com/people/Frederuna-von-Ringelheim/60000000136011...

While the dates don't line up (but are confusingly close), I would think
that it would be appropriate to mention the other and explain why
they aren't the same person. My head spins as I try to line up the narratives
and figure out whether they are the same (or related) thanks.