Hello,
The Osnabrück emigration archives list these Kemper names:
PERS Kemper, A. M., weiblich 16282
PERS Kemper, Adolph 15263
PERS Kemper, Anna 7833
PERS Kemper, Anna 7834
PERS Kemper, Anna Maria 8221
PERS Kemper, Anna Marie 16299
PERS Kemper, Anna Sophie 9699
PERS Kemper, Anne Marie Elisabeth 25862
PERS Kemper, Anne Marie Louise 24971
PERS Kemper, Bernhard 7834
PERS Kemper, Carl Heinrich 21493
PERS Kemper, Caspar Heinrich 24972
PERS Kemper, Caspar Heinrich 24973
PERS Kemper, Caspar Heirnich 18460
PERS Kemper, Catharina 7833
PERS Kemper, Catharine Elisabeth 21786
PERS Kemper, Catharine Marie 24973
PERS Kemper, David (Daniel) 505
PERS Kemper, Eberhard Heinrich 21494
PERS Kemper, Franz Heinrich 9698
PERS Kemper, Friedrich 9699
PERS Kemper, Friedrich Wilhelm 24973
PERS Kemper, Friedrich Wilhelm 24975
PERS Kemper, Friedrich Wilhelm 25861
PERS Kemper, Georg Heinrich 19462
PERS Kemper, Gerhard 7834
PERS Kemper, Gerhard 8273
PERS Kemper, H., männl. 3497
PERS Kemper, Heinrich 10844
PERS Kemper, Heinrich Friedrich 24974
PERS Kemper, Helena 7580
PERS Kemper, Hermann 7833
PERS Kemper, Hermann Heinrich 13300
PERS Kemper, Hermann Heinrich 21495
PERS Kemper, J. H. 16309
PERS Kemper, J. H., männl. 8056
PERS Kemper, Jan Gerd 6328
PERS Kemper, Jobst Heinrich 25862
PERS Kemper, Johann Caspar 9699
PERS Kemper, Johann Conrad 9699
PERS Kemper, Johann Conrad 9700
PERS Kemper, Johann Friedrich 24971
PERS Kemper, Johann Heinrich 13301
PERS Kemper, Johann Heinrich 13302
PERS Kemper, Johann Heinrich 13303
PERS Kemper, Johann Heinrich 16267
PERS Kemper, Johann Heinrich 16310
PERS Kemper, Johann Heinrich 16311
PERS Kemper, Johann Heinrich 19462
PERS Kemper, Johann Heinrich Mest 8273
PERS Kemper, Johann Matthias 9700
PERS Kemper, Johann Rudolph 16312
PERS Kemper, Johann Rudolph 16313
PERS Kemper, Joseph Gottfried 4411
PERS Kemper, Kaspar Heinrich 24975
PERS Kemper, M. A., weibl. 8274
PERS Kemper, männl. 21494
PERS Kemper, männl. 9584
PERS Kemper, Margarete 16314
PERS Kemper, Margaretha 8273
PERS Kemper, Margarethe 16282
PERS Kemper, Maria Catharina 20153
PERS Kemper, Maria Clara 9699
PERS Kemper, Maria Gertrud 9699
PERS Kemper, Marie Catharine 9700
PERS Kemper, Marie Elisabeth 25862
PERS Kemper, Marie Engel 21494
PERS Kemper, weibl. 21494
PERS Kempers, Maria Elisabeth 5266
I don't know if your Maria Gertrude was married before emigrating.
There are no Neimanns listed in the emigration archives of Hannover,
Osnabrück or Wolfenbüttel. There are Niemanns.
There is a Johann Ludwig Korff from Lüneburg listed in the Hannover
archives.
These are the names for Korf and variations in the Osnabrück archives:
PERS Korf, männl. 2819 Quakenbruck
PERS Korf, männl. 2820 "
PERS Korf, männl. 2821 "
PERS Korf, männl. 2822 "
PERS Korfage s. a. Korfhage 4047
PERS Korfage, Severin 4046
PERS Korfage, Severin 4047
PERS Korff, Anne Christine Lucie 6953 Fürstenau
PERS Korff, Christian Heinrich 6953 "
PERS Korff, Johann Friedrich 6953 "
PERS Korff, Sophia Luberta, Freiin von 27010
PERS Korff, von 22946
PERS Korff, W., männl. 22946
Good luck to you!
Barbara