I have always been interested in very local words and find that bread tends to have quite local names. It didn't, traditonally, have to travel very far, it was made locally so it was fresh every day and the local baker could give it any name they liked as long as the locals understood it.

Here's a link to an earlier thread:
http://wordsmith.org/board/showthreaded.pl?Cat=&Board=wordplay&Number=1630