Most people my age are grandparents (just to let you know how old I am). I still call my one remaining aunt Aunt Shirley. (Luckily her name really is Shirley or that would be totally weird.)
Slightly off topic, when I was first becoming frum, I spent a Shabbos with a frum family. I was totally taken aback when their children called me by my first name. I was nearly 30 and I didn’t feel that I was in a peer group with 3-year-olds. I soon discovered that it was the norm among frum people to address single women of any age by their first name. It was quite disconcerting when married “women” younger than I (teenagers, actually) were called Mrs. So-and-so by the same children who used my first name. I’ve gotten used to it.
I might add, however, that one of my second cousins has her children call me Cousin Haifagirl. She doesn’t want her children calling adults by their first name.
Off my soapbox now.