I am looking for any descendants of Isaac Peifer (1835) and his first wife, Henrietta (Dunkelberger-1829). His daughter, Ellen (1863) married a Steffen and had a son, Newton. Another daughter, Alice, married a Rumfelt. In 1870 Isaac appears in the census in Snyder Co., Union Twp. I would appreciate any help or leads on this part of the family. Thanks in advance, Sandra V.