You have said, "So while there was without doubt much mispelling of names in Colonial times, a fact I would never attempt to dispute, the three names above have a centuries old origin. Consequently, it is reasonable to assume that many of those same names in Colonial times, are in fact the correctly spelled names of many of the people you and others allege to have mispelled their names."
While your thesis is convenient, it has no bearing on the identifications before you (us).
Still again, I will tell you that surname spellings were not fixed during the era to which we have reference, and frequently have no resemblance to the surnames ultimately 'codified' within each family group.
In actual genealogy, as I have said recently, the Dutch Naming Conventions play a very large and legitimate part in determining one's New York Dutch ancestry. Very recently, Doug again alluded to this. Recently, I have asked you to familiarize yourself with this 'system' of given names.
You need to pay attention to this. Both Maria and Ferd Eastling have their names by way of direct ancestors. How? Why?
I have already asked these questions. So did Mr. Van Curen long before I jumped in here. You need to understand and internalize this, Cousin.
It was used by your family.
It tells you much of what you need to know to determine your correct Van Sic[k]len ancestry.