January 11 - How did you get your nickname?

My dad always called me "Jilly". No one else seem to call me that, so i guess it was his own special name for me. My great-grandpa Lingard called me "Halfpint" because according to him that is what halfpint meant in England where he was from. I always wanted to be called J.J. because those are my initials and I have no middle name. I'm a J.J. wanna be!