Mayer, Schalk, Seigmann, Eisenbeifs, Dentzer (Annweiler)

I am trying to trace my ancestors and possible family ties. My great grandfather was Wilhelm Schalk who married Anna Eisenbeifs.
Their daughter, Hedwig Anna, married Franz Oscar Mayer. Their only son, William(Wilhelm), married Grace Francis Covella. Their son(me,William Mayer Jr.)married Joyce Ann Mahoney.
My Grandparents, Franz and Hedwig immigrated from Annweiler, Germany to Lancaster, PA. and finally to the Bronx, NY. In 1936 my grandmother died and is buried in NY. Up till now I have not been able to find out where she is buried. Her brother was living in Millersville, PA at that time.