Suddenly last month Denis started calling my brother Un-Con. From the time Denis came home he has been able to say Uncle John. I guess he just decided it was too long of phrase and he has shorten it down to Un-Con. At first I thought he was saying uncle in a strange way, but no, it definitely is Un-Con.
After just a few months Denis decided not to call my sister Aunt Kathryn, he shortened her name down to just Ka, which exactly what Kathryn calls herself.
My brother said he'd always heard of children changing a person's name, but most times it is because the child has difficulty saying the word. In Denis' case it was to make the job easier. That's my boy, look for the easiest means to the end.