WIELE/LEFHALM-Huellhorst

I am looking for additional information on my third great grandparents. They
were Heinrich Hermann GROSSE-WIELE born 31 July 1791 died in 1866 Huellhorst
and Anna Catherine Ilsabein LEFHALM born 18 May 1793 Spradow,Evangelisch
Buende. They were married 11 July 1814 Huellhorst. As far as I know their house
is still standing today. Heinrich's parents were Johan Henrich OEVERMAN and
Anna Margretha Ilsabein GROSSE-WIELE ,married 3 January 1773. I have been
unable to find any further information on this couple. I would like to know if
they had other children and who their parents were. I am also looking for
clarification on the parents of Anna Catherine Ilsabein LEFHALM. The record is
very hard to read,but it looks like Cord Henrich LEFHALM and Christina Maria ?
Any further information would be greatly appreciated.

Thank you,

Cindy Fregoe