Note:  I've opted for the KOPF spelling simply because it's the most common one in Germany, based on the LDS database.

1.  Walter Allen Knittle.  1937.  Early Eighteenth Century Palatine Emigration: a British Government Redemptioner Project to Manufacture Naval Stores.  Dorrance & Co., Philadelphia (reprinted 1965, Genealogical Publ. Co., Baltimore, MD; Broderbund CD-267):

p. 248	C. THE EMBARKATION LISTS FROM HOLLAND These lists comprise the enumeration of five separate sailings of Palatines from Holland....  So far as possible the enumerations have been retained in exactly the form in which the Dutchmen made them... "vrouw" means wife...
p. 264	FIFTH PARTY—EMBARKED JULY 3 TO JULY 10, SAILED JULY 15, 1709...
p. 267	Kop, Jacob & vrouw, 4 ch.
p. 282	E. THE NEW YORK SUBSISTENCE LIST This list was compiled from the "journal" of Palatine debtors to the British government for subsistence given either in New York City or in the Hudson River settlement, from their landing in 1710 to September, 1712... [Of up to six possible sets of numbers, only two sets, the first and the last, are given here, which typically means the first set is from a 1710 list while the second set is from a 1712 list.  Within the pair of numbers, the first number is the number of adults, the second number is the number of children, with children over ten years of age counted as adults.]
p. 286	Kopff, Jacob 1-0, 6-0
p. 300	G. PALATINES WHO MOVED TO THE TULPEHOCKEN VALLEY IN PENNSYLVANIA The first list given below (I) is... from a petition for a road from Olney to Tulpehocken presented to the Court of Quarter Sessions at Philadelphia in September, 1727... The second list (II) was compiled by Mr. C. Lindemuth... from land deeds and land patents... published in The Pennsylvania German (Lebanon, Pennsylvania, 1904), V, 191... COLONIAL RECORDS OF PENNSYLVANIA LIST (I)... Kobff, Jacob...
p. 301	THE LINDEMUTH LIST (II)... Kapp, Jacob...

The fact that someone sails from a Dutch port (probably Rotterdam) does not necessarily mean they were Dutch.  The 1710 reading from the subsistence list appears to be a mis-reading because the numbers from the 1712 list make sense, that is, that "6-0" represents a married couple with four children over ten years of age.  If the first set of numbers is not a mis-reading, we need to rethink what this record means… (It could be as simple as Jacob having left his wife and children in New York City during the first winter at the camp.)

2.  Lou D. MacWethy.  1933.  The Book of Names, Especially Relating to the Early Palatines and the First Setlers inthe Mohawk Valley.  St. Johnsville, NY (reprinted 1999 for Clearfield by Genealogical Publ. Co., Baltimore, MD; Broderbund CD-267):

p. 125	List of Palatines Who Volunteered for the Expedition Against Canada in 1711... HAYSBURY... Cup, Jacob...
p. 127	The foregoing was taken from Documentary History of New York, Vol. III, by E.B. O'Callaghan, published by the state printer, Weed, Parsons & Co. of Albany in 1850...

Haysbury was one of the original Palatine settlements on the east bank of the Hudson River, in Dutchess Co., NY, collectively know as "East Camp" (as opposed to the settlements on the west bank of the river collectively known as "West Camp," in Ulster Co., NY).