I asked, the nanny said she didn't care, so we introduced her to the kid by her first name.

Nanny here. I go by my first name but my favorite is when the kids give me a nickname based on their best approximation of my name.

I think going by Ms. Lastname would be incredibly formal and I can’t imagine doing it.

I AM southern so the “Miss Firstname” things sounds normal to me, but it also feels kind of distant. I am hardly a “big sister” type as someone above implied, but I tend to nanny primarily for infants and toddlers so it is a deeply intimate relationship. It feels overly self-important to choose some kind of arbitrary invented honorific. There really isn’t a parallel relationship to the kind of nannying I do (typically with the kids from birth or early infancy through preschool or kindergarten). So I am just myself. My name is it’s own badge of honor on the tongues of my beloved charges.

Our nanny prefers her first name. We checked with her to make sure.

What’s nannies preference?

I know a handful of nannies who go by Nanny and many who go by Mrs/Ms/Miss first name.

I just go by my first name and do not wish to go by Mrs. or Nanny.

I was always Mimi because my name was long/difficult. Parents often said “ask your Mimi” or “your Mimi will take you to school”.

We had a summer nanny who was a teacher at my kids ES so they always called her Miss XXXX so when they went back to school it wouldn't be an issue. I had nannies growing up and we always called them by their first names.