Jess or Jay come to mind.
Jesse Ranney goes by Jesse James.
Jesse Sinopoli goes by Jess.
Jesse Shoemaker goes by Skippy.
Jesse Springer goes by J.
Jesse Stevenson goes by Mookie.
Jesse I Ettinger goes by Jesstator.
Jesse Ricketts goes by Cricketts.
Jesse Coulter goes by JAC.
Jesse Cowell goes by Jeskid.
Jesse Gavin goes by Tito.
George Jesse goes by JC.
Jesse Heiman goes by Manpeach.