I believe that this is the correct marriage record for 12 & 13. A family story says that 6 & 7 in my pedigree chart were first cousins. 13 & 14 are brother and sister. I found 2 possible birth records, which one is most likely for person 12? Or, maybe neither, see next paragraph.
There is another clue that I can't make sense of: The 1900 U.S. census entry for Dietrich (#6) indicates that his father was born in France. The 1910 census U.S. census entry for Fannie (#3) indicates that her father (Dietrich) was born in Germany but his "mother tongue" was French. If his parents spoke French at home, then he could have learned French first. Some other census records indicate that Dietrich's father was born in Germany.
This French connection seems unlikely to me. France is far away from Mecklenburg. Reimer is a German surname. Are there any other logical explanations? Any clues in the sponsors that I am missing? If France was only mentioned in one U.S. record, it could just be a mistake, but it is mentioned in two records.
Birth of 6:
Edit: Birth of 6's Sister:
Edit: Birth of 6's Brother (maybe):
13 & 14 in the pedigree chart:
Candidate #1 birth record for person 12 on pedigree chart:
Edit: Death record for candidate #1. If he was born and died in Gnoien he is unlikely to have had children in Kessin.
Candidate #2 birth record for 12: