I'm also looking for Weingartners in NY, but on the west side of the state, in Hamburg, Erie Co. My connection is also tenuous, but according to a family Bible, John Fahr Weingartner was born in 1800 in Dowbrun?, Germany and died in 1873, also in Germany. His son William (Wilhelm) emigrated to New York in 1881 and settled in Hamburg. At the same time, though, it appears he dropped the Weingartner part and went solely by William David Fahr. His mother's name was Johanna Weiz, I think, so he wasn't taking his mother's maiden name.
Any ideas, o researchers of names? Thanks in advance. Scott Pfitzinger