Pronunciation?

So, everytime I take the back roads from the North, my eyes catch a glimpse of a name on a mailbox in big, bold letters that says DUHME.

Now, I think to myself, how is this pronounced? Could it be pronounced “dummy”, or possibly “do me”, or maybe even “doom”, or lastly “dumb”. Any ideas?

I almost want to stop at their house & ask them.....But I don't, and won't.