I'm actually a William Wilcockson descendant, which means we are very very distant cousins via an unknown common ancestor. No documentary link has been found between these two large families, but it's evident in the DNA.
I gather there is considerable difference of opinion amongst Boone-Wilcoxen researchers as to John's origins and parentage, some feeling that the connection to George in England is sketchy at best.
Those who are convinced that George is their patriarch need to track down documented descendants of his in search of a testable male in the lineage, and get him to submit a cheek swab to the Wilcox DNA project. ;-)