I noticed that you have posted several responses to people asking about different families in Dudenhofen!
I too am researching the MAHR family of Dudenhofen but do not have any information other than my husband's immigrant ancestor named Anna MAHR b. 15 Aug 1844 in Dudenhofen.
The location of birth obtained by Hamburg emigration list Jun 1869 - she left with husband-to-be Wilhelm WETTEROTH of Babenhausen; birth date from St. Louis MO death certificate.
Do you know if the book by Albert Kaemmerer is still available and if so, how does one obtain it?
Kim Curlin Wettroth