First of all, it's Scottish, not "Scotch."You drink scotch.
The idea that the Germanic KAPPs who immigrated to America were originally Scottish is sheer tommyrot and is probably added evidence of our subject's obviously intense snobbery (craving an ancient British origin over a more recent German one).
Andreas KAPP, husband of Regina Sophia, was not the first KAPP/KOPP in American, though he and his brothers were among the early ones.There was, indeed, a large contingent of Palatine Germans imported into New York in 1710, as part of a government program to produce naval stores (e.g., lumber, turpentine, pitch) for the British navy.Some of these Germans did become dissatisfied with their situation in New York and did migrate south into Pennsylvania.However, as Johann Andreas KAPP, husband of Regina Sophia MUELLER, was born in 1711 in Bavaria, he cannot possibly have been one of the adult Palatines who immigrated to New York in 1710, so the story of the trip through the wilderness is purely faniciful.Andreas KAPP & Regina Sophia (MUELLER) SIEGMANN were married 8 Dec 1739 in the Tulpehocken Church in Berk Co., PA; thus, they could not possibly have immigrated as a couple in 1710.Andreas & Regina Sophia were not childless, as baptismal records in the Tulpehocken Church prove.There was an Andreas KAPP listed among the adult (over age 21) immigrants to New York in 1710, but he cannot be the one who married Regina Sophia -- and this Andreas KAPP may very well be the earlist documented one in America.
The spelling CAPP was not rigidly retained by the family.A great many went by COPP, including Andreas's descendants!I won't go on, but it's clear that the subject's and the author's standards of scholarship were very low, so caveat emptor!