Hyper key showing as Super key

Question

I want to use the hyper key in Emacs. Have changed the keyboard layout to Generic 101-key PC and am doing this check to determine whether keycode 66 is associated with the Hyper key.

actm=$(xmodmap -pke | grep "Hyper" | grep "66")

But when I hit the Hyper key in Emacs, it is showing up as the Super key.

Have used xev on the Hyper key and get

KeyPress event, serial 37, synthetic NO, window 0x5400001,
   root 0x16a, subw 0x0, time 17997615, (79,39), root:(1257,1320),
   state 0x0, keycode 66 (keysym 0xffed, Hyper_L), same_screen YES,
   XLookupString gives 0 bytes: 
   XmbLookupString gives 0 bytes: 
   XFilterEvent returns: False

How can I get Emacs to consider the key as Hyper rather than Super?