Pottery Genealogy

The "pottery genealogy" shown here is the way I understand that pottery skills were passed down from Bernard Leach.
It is my understanding that the guys did an apprenticeship (usually two years)  under the name above him. I've not apprenticed under Andrew, but I've studied under him for the last four years. Andrew went to college with Ben Owen III. The Ben Owen listed in this genealogy is the grandfather of Ben Owen III.
I'm really lucky to be taught by Andrew Stephenson.