[Ger-Poland-Volhynia] Grave - place of birth

[Eduardo Kommers]

Hello dear friends!

I'm trying to help a friend with some information from a grave here in
Brazil.

Please, open the link:
https://billiongraves.com/grave/Valentin-Lindenmeyer/17390478

It says Valentin is from "Rhn Krs. Bayern"
It would be RheinKreis maybe?!
If yes, any idea where the original birth records are?

Thank you,
Eduardo Kommers