Previous post of Norman Harker's, that will give you a very quick way to get rid of them all.
Simplest way is to use an old Lotus keystroke command that works in
Excel but which doesn't have an equivalent without VBA.
Tools > Options > Transition
Select the Lotus 1-2-3 Help option
Thereafter:
/RNR
Will clear all of your names including those set by Excel such as
Print_Area.
But watch out. There's no, "Are you sure!" And there's no Undo
capability. But if this is what you want, it sure beats doing it one
at a time.
A more user friendly approach is used by Rob Bovey in Excel Utilities
1.5 obtainable from:
Rob Bovey
http://www.appspro.com/
Apart from this clearance of all names there's a lot more other useful
"everyday" utilities included.