Why do you need a shortcut to name box?
the name box is working itself like a shortcut to navigate in a worksheet, just type there the cell adress, press enter, and the cursor will be placed in that cell...
You can use it to name a cell or a range of cells, try selecting a range, then enter a name in the name box and press enter, you will find the name in the name manager , or you can select that range by choosing the range name from the name box drop down menu.
It's like the formula bar, next to name box, you don't need a shortcut to formula bar ...