Family Tree DNA (ftDNA) is a commercial genetics genealogy company, with a reputation for cornering the market in Y-DNA testing, and in accumulating references for haplogroups.
That map above, that is the sum total of Y haplogroup L submissions on their database for the UK. All four of them. The two to the east are L2 and L2a. The one in Oxfordshire represents my own pending results (expected L1b or L-M317). Just to the south of that, the SW representative, is kit number 26369.
The cluster in Central Europe, is the "Rhine Danube Cluster", but that is L1a (L M349).
So you see, except for kit 26369, my Y haplogroup is way out here, like a distant satellite on it's own. So what is Kit 26379? Well, it is only a Y12 STR test result. Predicted to M20, but it has been assigned to L-M317 un-clustered. Up to now! It's located only 32 miles south of my surname line during the 1740's. Could it relate to our line?