When I lived in Freiburg, in the Black Forest, the equivalent to the "Bodmin" expression (and for the same reason) was to say that someone "came from Emmendingen".

Some years ago, we thought we were going to move to Northamptonshire because of a work transfer, and an estate agent warned against the town of Desborough: "People say around here that the Desborough folk are peculiar. It's a funny place. Lots of inbreeding." Whether this was an estate agents' ploy because they had properties they wanted to sell in Market Harborough or somewhere else, I don't know....

- jeanie