One of my first introductions to the frum community was when I was invited to a Shabbos meal at the home of X* family. When the kids started calling me by my first name, I was shocked. I had never encountered such a thing before. I never called adults by their first names, unless they explicitly said to.
I discovered it was common in the frum community to call adults by their first names. I really didn’t like being in a peer group with three-year-olds, but that’s the way it was.
Then I noticed kids who were several years younger, were Mrs. Y simply because they were married, while I was still Z. I was especially irked when kids would call their friends’ moms Mrs. Y or Mrs. W, when Mrs. Y and Mrs. W were both my age or younger.
Fast forward about 20 years.
I’m still friends with the X family. Their kids, mostly adults now, still call me by my first name. So do their grandkids. And one day Mrs. X was complaining to me about a friend of her. She hates when their very-nearly-adult daughter calls her by her first name.
Meanwhile, I got so used to it, when I became friends with the A family, I was quite shocked when the teenage children called me Miss Z. But that is their upbringing. Their parents call all adults Mr. or Miss or Mrs. Whatever until such time as they are given permission to call them by their first name.
Since I’m Facebook friends with those now-adult children, they call me by my first name.
*All names and initials have been changed to protect the guilty.