The William Wilkerson (Wilkinson) research group has collaborated to reveal a unique male line marker BY32759 that is now available as an individual DNA test for less than $25. At this time, 4 direct descendants of William Wilkerson, buried in Brown County, IN have tested positive for this specific SNP marker. The research group has developed a large family tree and offer other modes of assistance to those seeking to trace their lineage through this particular Wilkerson line. You may respond here if further information can be helpful to your research.