The Slawitz family: Feige Slawitz Berman and Chaia Sarah Slawitz Stein

Confirmed! My third great grandmother Feige Slawitz Berman had a sister, Chaia Sarah Slawitz Stein.
AncestryDNA results mildly interesting

The results of my AncestryDNA test pointed to a surprising component of my genetics, but where can I go from here?
Marriage certificates received: Berman/Neckameyer, Lustig/Sturmwald, and Klein/Herman

My family history research continues with the first records received from the New York City Department of Records.