The worst of it is when you forget to check your own notes on a subject, spend an hour working it all out again, then go to write it down and… find all your notes from the previous time.

It’s interesting you chose to use ozgrid as your source for guidelines for naming cells. Following your link leads to:
* The first character of a name must be a letter or an underscore character. Remaining characters in the name can be letters, numbers, periods, and underscore characters.
* Names cannot be the same as a cell reference, such as Z$100 or R1C1.
* Spaces are not allowed. Underscore characters and periods may be used as word separators for example, First. Quarter or Sales_Tax.
* A name can contain up to 255 characters.
* Names can contain uppercase and lowercase letters. Microsoft Excel does not distinguish between uppercase and lowercase characters in names. For example, if you have created the name Sales and then create another name called SALES in the same workbook, the second name will replace the first one.

Now, check Excel 2003 help for ‘About labels and names in formulas’ particularly the section titled ‘Guidelines’:

What characters are allowed? The first character of a name must be a letter, an underscore character (_), or a backslash (). Remaining characters in the name can be letters, numbers, periods, and underscore characters.
Can names be cell references? Names cannot be the same as a cell reference, such as Z$100 or R1C1.
Can more than one word be used? Yes, but spaces are not allowed. Underscore characters and periods may be used as word separators — for example, Sales_Tax or First.Quarter.
How many characters can be used? A name can contain up to 255 characters.
Note If a name defined for a range contains more than 253 characters, you cannot select it from the Name box.
Are names case sensitive? Names can contain uppercase and lowercase letters. Microsoft Excel does not distinguish between uppercase and lowercase characters in names. For example, if you have created the name Sales and then create another name called SALES in the same workbook, the second name will replace the first one.

Finally, check Excel 2007 help for ‘Learn about syntax rules for names’

* Valid characters The first character of a name must be a letter, an underscore character (_), or a backslash (). Remaining characters in the name can be letters, numbers, periods, and underscore characters.
Note You cannot use the uppercase and lowercase characters “C”, “c”, “R”, or “r” as a defined name, because they are all used as a shorthand for selecting a row or column for the currently selected cell when you enter them in a Name or Go To text box.
* Cell references disallowed Names cannot be the same as a cell reference, such as Z$100 or R1C1.
* Spaces are not valid Spaces are not allowed as part of a name. Use the underscore character (_) and period (.) as word separators, such as, Sales_Tax or First.Quarter.
* Name length A name can contain up to 255 characters.
* Case sensitivity Names can contain uppercase and lowercase letters. Excel does not distinguish between uppercase and lowercase characters in names. For example, if you created the name Sales and then create another name called SALES in the same workbook, Excel prompts you to choose a unique name.

Going to the source (i.e., the Excel help files) leads to additional information about starting characters as well as other subtleties. Additionally, there is a change in behavior in how Excel treats duplicate names (see the last rule in both Excel 2003 and Excel 2007)

I wish if something like the “Comments” portion of Name Manager in Excel 2007 can be added to NM.

Regards
Kanwaljit

The wvu names are inserted when you create custom views
I forgot what the wrn’s are for
The Filter name is inserted when you use advanced filter.