The name Indy is a girl's name . Indy and is often added to user-created lists like Four Letter Girl's Names and discussed in our forums with posts like "Pick 5 (GIRLS)".
From the experts:
The heroic movie figure Indiana Jones was often called Indy, as in the equally testosterone-laden Indy 500 car race. Indie, as in indie films, is the more girlish version of the name, sometimes short for India or Indigo.