DNA Study: Celtic ancestor root of Colson family tree?

Steve Colson of Brentwood, California, has spent quite a bit of time doing DNA research on his branch of the Colson family, specifically median-joining network analysis on Celtic motif haplotypes. His halpotype fits into that Celtic motif, although his first known Colson ancestor lived in the Fenlands of England. His theory is that his Colson ancestors served the Bishopric of Dunkeld (in modern-day Perthshire, Scotland) and left with Waltheof, Lord of Alledale and Abbot of Crowland Abbey (Lincolnshire, England) somewhere between the years 1126 and 1138.

In the case of Steve Colson's DNA study, the series of Y-DNA standard tandem repeats (Y-STR) give a 'fingerprint' of ancestral nodes, which is where people branch apart from one another. His haplotype is R1b1, which is of a Celtic motif. Through Single Nucleotide Polymorphisms (SNPs) testing he was able to confirm and refine his haplogroup to R1b1c*, common to the Basque and Celts.

In his study of surname distribution in the United Kingdom, he determined that the 19th century Colson surname density (occurrence per 10,000) shows two distinct epicenters in Northumberland and Huntingdonshire. That would suggest that the Colson populations originated from an ancient ancestor in those regions. He suspects that the Huntingdonshire Colsons are descended from an early c. 14th John Collesson of Crowland. Coulson seems to be a more common spelling of the surname in the Northumberland region, while Colson is common to the north of Huntingdonshire and Coulson radiates south of Huntingdonshire.

In the near future, I plan to participate in the DNA study to see which branch of Colson I descend from and hopefully determine the origins of my branch of the Colson family surname.

(Source: Steve Colson. DNA Helix image taken from Helix Biological Laboratory)