I looked to see if there were any GINNIPs or GENNIPs in a couple of the large public Y-DNA databases, but there aren't.I did notice that GENNIP seems to be a German surname.Perhaps that is a variation of GINNIP.
If you know any male VICK descendants of Charles, you might see if one would be willing to send a DNA sample in for testing.You might match someone that could lead to finding Charles' ancestor.If you order a kit from the Sorenson Molecular Genealogy Foundation (SMGF), there is no charge (they even pay the postage).It could take a year and half or more before they post the results, but since it is free that at least would be an avenue to explore. We also have a VICK Y-DNA Surname Project through FamilyTreeDNA.While testing there isn't free, it is relatively quick.
I am doing a one-name study on VICK, so I will note your thought that this VICK line could have originated from a GINNIP and let you know if I find something later.
Larry www.one-name. org/profiles/ vick.html http://worldfamiliehttp://worldfamilie s.net/surnames/ v/vick/pats. html