1.  Anon.  1983.  Pennsylvania German Church Records...from the Pennsylvania German Society Proceedings and Addresses.  3 vols.  Genealogical Publ. Co., Baltimore (Broderbund CD-130).  In Vol. I, on p. 448:

Augustus Evangelical Lutheran Church, Trappe, New Providence Township, Montgomery County:  Marriages

January 12, 1757, in New Hanover.     Kop, Ludewig, from Schippach     Eschbachin, Maria

Germans add an "-in" to surnames to feminize them (i.e., the men in her family would be surnamed "Eschbach").  And could she possibly be a Fischbach?  There were several early Kopp-Fischbach marriages.  It wouldn't take much of a transcription error to turn "Fi" into "E".
Jacob KOP was married in the same church the previous year.