My son wants his teacher to use his middle name and I keep answering for him

My eight-year-old wants to be called Miles at school. Miles is his middle name.

At home, we call him Andrew. He hasn't asked us to change that.

Another Andrew joined his class, and the children have been adding their last initials. My son doesn't like how his sounds. He says Miles would be easier.

I told him there were plenty of people with the same first name. He said he knew. That wasn't a question.

Then I told him Andrew was a name we loved. He said he still liked it at home.

I had managed to turn a classroom preference into a conversation about my feelings twice before breakfast.

He has tried introducing himself as Miles to one friend. The friend used it. Nothing dramatic happened. The world appears capable of handling a name we gave him ourselves.

I don't know what arrangements his teacher uses for names on lists or assignments. I can ask without claiming that one conversation changes every school record. He isn't requesting a formal name change. He wants people to call him something else during the day.

My husband thinks we should wait and see whether he still wants it next month. I can see the attraction of waiting. I also can't explain why continuing to use Andrew would be neutral while trying Miles would be a major decision.

What I worry about, if I'm honest, is losing a small piece of familiarity. I hear his first name and remember choosing it. He hears it at school and waits to find out which Andrew somebody means.

Those are different experiences of the same word.

Would you let him raise the request with his teacher and ask what would work, or handle it together in a message? I want to support the preference without making promises about school procedures. Mostly I want to stop explaining why his request shouldn't bother him when he has already given me a perfectly ordinary reason.