Comment by cestith

Gerry is also short for Gerald sometimes.

Tony in the US is often short for Anthony.

Chris, Kris, or Cris can be short for Christina, Kristina, Kristofer, Christopher, Kristian, Kristian, Christy, Krista, or Kristi. Sometimes you'll see Crys, Chris, Krys, Kris, or Cris for Crystal/Cristal/Chrystal/Krystal.

You'll also sometimes see Christopher shortened to Topher or to Kit.