What is the etymology of the last name Mapes?

Answer:
I'm sure that this is not the answer to your question, but the question reminded me of "the Shadout Mapes", a character in the Dune series of books by Frank Herbert. From the way that she gives her name, "I am the Shadout Mapes" it appears that Shadout is a title and not her given name.
Contributor: Emdrgreg
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