Hi Marilyn:
First, you list 6 towns/cities, then 6 surnames. Are you looking for
one family in each of the 6 towns or are you looking for all 6
families in all 6 towns. It would help the list to asist you if you
can associate a surname with a town.
Neuenwalde, and Mulsum are a short distance from Cushaven,
south and Altenbruch is southeast.
[1]Google Maps
It appears that they all are in Kreis Lehe. The Mormans/LDS have
information for the Lutheran Churchs in Neuenwalde and Mulsum for
1716-1852. There is also information for Cuxhaven.
[2]http://www.familysearch.org
Good Luck,
Gale