Anne,
There are three Wolf/Wolfe listings in Dr. Schwalm's book. The first is a John
Wolf, but he was born in 1963 and died in 1980.
The second is George M. Wolfe, born 1871, died 1951 and wife Sarah born 1875, died 1955. They are buried at St. Peter's Lutheran or Long's Church in Powell's Valley.
The third is Erenest E. Wolfe, son of Joseph and Kate, born 1894 and died 1896, buried Old Union Lutheran/Reformed Cemetery,
Lykens.
There are several listings for Rebecca in the Church
Records of Zion's Union Church,
Orwin (birth and death), but I can't find any for her father, John. There is, however, a birth for a Sarah Wohlf (by the way, Rebecca's record is spelled Wohlf also, so you might be dealing with yet another spelling), daugther of
Johannes and Sarah, born August 23, 1833, baptised May 23, 1834, sponsor, Catherine Hend (it reads "Hend", but should probably read "Hand."
I can't find anything else. I'll look again to make sure I didn't miss anything and will let you know if I find something.
Tammy