Well, I found these various meanings, if that helps (if you want a middle name to go along these routes..):
Hebrew Meaning:
The name Jasper is a
Hebrew baby name. In Hebrew the meaning of the name Jasper is:
Jasperstone. American Meaning:
The name Jasper is an
American baby name. In American the meaning of the name Jasper is:
Jewel. English Meaning:
The name Jasper is an
English baby name. In English the meaning of the name Jasper is:
Jewel. Arabic Meaning:
The name Jasper is an
Arabic baby name. In Arabic the meaning of the name Jasper is:
Keeper of the treasure. French Meaning:
The name Jasper is a
French baby name. In French the meaning of the name Jasper is:
Keeper of treasure. Derived from Gaspar or Caspar. Persian Meaning:
The name Jasper is a
Persian baby name. In Persian the meaning of the name Jasper is:
Master of the treasure.
I was thinking along the Keeper/Master of the treasure, you could go with the origin name of Casper
Jasper Casper (that may be a mouthful...I'd end up calling him JC cuz I'm lazy lol)