Oldenburg-L Digest

My mission to find my great grandfather and any other progeny has been
stopped by the fact that the small towns in Oldenburg, Kuhlen, Barghorn and
Grossenmeer are only archived in the various churches, not available at
Ancestry.com nor with the family search library. Is that true? Is there no
one place in Oldenburg that serves genealogists, like in Bremen? Here is my
'brick wall':
  Fredrick Burghard Morisse, b. 05 Jul 1842, Oldenburg, married Helene Elise
Janssen, b. 01 Jul 1851 in Kuhlen, (married 30 May 1879), immigrated to U.S.
(Texas) in October 1891.
  What I am looking for is Fredrick Burghard Morisse's family origin,
parents, brothers, etc. I am trying to trace back his French name (?). I
have Helene's Janssen family. Where would I look for that information?
Your expertise is important in this search, and I thank you in advance.
  Happy New Year!
  Georgina (Dina) Morisse Bensen

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