Looking for Christian Lachmund Birth

Hi

I am looking for Family of
August Heinrich lachmund, born 1840, Kniestedt, Salzgitter, Lower Saxony, Germany.

Conrad Carl Lachmund, born 1837,Kniestedt, Salzgitter, Lower Saxony, Germany.

Christoph Heinrich, born 1835,Kniestedt, Salzgitter, Lower Saxony, Germany.

Their parents were Christian & Christina Lachmund ( Lages)

I would like any information on Birth of Christian Lachmund their Father.

Wedding of their parents any more info.

Thanks

Andrew Digby