I call all of my aunts, aunt, except Auntie Ellen. It was just easier for us kids to say Auntie Ellen than to say Aunt Ellen...I am guessing.
Wait, now that I think of it..we called Elna, Auntie Elna. And then there was Auntie Pat.
Ok, I guess we called all of them auntie...but it was something decided by my elder siblings and cousins and passed down to me. I see now that my cousins even call my mom Auntie Carroll. It's not my fault!!