John Phillip Ritzheim (OH's MMMMF)
 

Name - John Phillip Ritzheim
Date and place of birth - Bavaria (1750-1775)
Names of parents - ??
Date and place of baptism - ??
Details of each of his or her marriages - Catherine ? approx. 1800
Occupation(s) - ??
Addresses where they lived (including county if in UK) - Bavaria
Date, place and cause of death - ??
Date and place of burial. - ??

Are they the couple whose daughter Catherine married Peter Joseph Bunn 27 Jun 1824 at the Catholic church in Freimersheim, Rheinhessen, Hesse-Darmstadt? And how do you know he was born in Bavaria, please?

Yes. We're at the moment assuming Bavaria for John (and his wife Catherine) because the daughter (Catherine) lists her birthplace as Bavaria in the 1870 US census. We haven't been to search German records yet.