Perhaps the road was named during a time when people used the correct definition of the word "dumb", and was named for a person who was unable to speak?
lol and I meant Bad "Luck" Brian in my last comment.. your memes are not bad... unless you're using the term like Michael Jackson's "Bad" song, and then they are, but that's not what I meant. lol
it's a 'trick' of Translation and Language evolution... the Village was founded in the 6th Century by a Bavarian Noble named Focko... it means 'Place of Focko's People'
Phantasmemegoric looked it up for me, and it was named like that because there was a "mute" woman who once lived on that road, and in the past they used the term "dumb" for mute people. It explains the "why", but still... lol