What does "Grape Nuts" mean?

From:  "Geoffrey Ludwig"

I am wondering why there is a cereal of wheat and barley called Grape Nuts. What the heck is it supposed to mean? Why the heck is it called Grape Nuts if it doesn't have grapes or nuts? How in the heck did Charles W. Post come up with that name?
 

Well... heres another question that we have received an alarming amount of answers for. Here is what everyone has thought out and well researched.

Jennifer was the first to turn in her homework, here's what she sent us:

Answer to your Grape Nut nut.........C.W. Post came up the name because the cereal contained maltose, which he thought was "grape sugar" and because the distinctive flavor reminded him of nuts.

Todd decided he wanted to share his thoughts and views with us:

 The name "Grape-Nuts" has nothing to do with the cereal itself. The name is implying that you can eat Grape-Nuts with grapes or nuts. Its like putting strawberries in your cereal.

Anni decided that instead of writing us, she would just send us a website so check it out.

from here

This unique, naturally sweet cereal was created in 1897. C.W. Post came up the name because the cereal contained maltose, which he thought was "grape sugar" and because the distinctive flavor reminded him of nuts.