Below are the haplotypes for the 9 Williamson members of the Little Scottish Cluster tested so far. Unlike Sloan or Kilgore, Williamson is much younger. Based solely on these haplotypes, its origin would likely be in the early 18th century. The Williamson Y-DNA results can be found in the Williamson FTDNA project in the E Sub group.
Paper genealogy can connect members 40172 and 20257. The other members do not have a known paper trail connection in the last 200 years.