On 28 December 2016, a St. Agnes (Cornwall) descendant matched a St. Merryn (Cornwall) descendant on 109 of 111 markers. So we have verified that these two Cornish Butson families are one and the same, thus achieving one of the three main goals of the Project. The current conjecture is that the St. Agnes branch was founded by Peter Butson, who was probably a son of the St. Merryn branch.

We still need Butson men to take the test to see if the Somerset-Devon and Muker (Yorkshire) Butsons also connect. But we still need Cornish Butson descendants to test in order to establish when the two mutations occurred so that they now match on 109 instead of 111 of the 111 markers.