Hi,
My ancestor, Cath. Marie SCHULTE married a Cord Heinrich BARTLING who was born in 1766 in Lutter near Mandelsloh, and Neustadt am Rubenberge, Germany. There were many Bartlings from that area. You might try to look there. The only thing is these records are NOT ONLINE....you either have to go to the parish church or get them from the microfiche at the Lutheran State Archives in Hanover or hire someone from Germany.
I, too, am trying to find connections of my Schulte/Schultze family to other family names including Bartling, Duensing, Niemeier, Mahler, Scharnhorst, Volberding, etc.
JJ