I have many nephews that call me by my given name. I have one that calls me Aunt Sissy. He was born 5 weeks before my son. For many years, until they were about 4 they called each other cousin, not by their names. There were some very cute conversations.
Babe. They call me Babe. I've always been called Babe by everyone in my family.
The other day a baker from another store came over to help, and the first thing she said after introducing herself was "Hi, Babe!" I told her that's my entire family's name for me, and wouldn't it be funny if my name tag was "Babe" instead of my name.