It is not clear where you want the name duplicated, but the obvious solution is to use a cross reference to the control. The simplest way to do that is to download the second add-in from
http://www.gmayor.com/BookmarkandVariableEditor.htm which facilitates the mapping of content controls to perform simple tasks like this. Then create a cross reference to the control in question and whatever you select in either will be reflected in the other.