Clare Maria Ellerbrock, Joellenbeck or surrounding area?

I am looking for the parents and other ancestors of Clare Maria Ellerbrock.
She married Johan Heinrich Luetgert before 1770,possibly Joellenbeck or
Schildesche or somewhere near there. I know of at least three children of
this marriage, Conrad Heinrich Luetgert born 1770, Franz Hermann Luetgert
born 1773, and Anna Margrethe Ilsabein Luetgert born 3 September 1780. Any
help would be greatly appreciated.

Thank you,

Cindy Fregoe