My older brother didn't want a sister, so he called me Charlie until I was about 3. The only way to get him to stop, my mom "charged" him every time he called me Charlie. He was a real miser...even at 6 years of age, and he hated not getting his full 10 cent allowance. So...he finally stopped. Then when I was in grade 2, a favourite game was "Pitter Patter"....so he started calling me Pitter. And almost 6 decades later, still does. ;)
Patti