I'm not married but when I was about 11 I saw post addressed to Mrs Peter Green (not real name)
I asked my mum who that was and she said it was her, when you get married she said, you take your husbands name.
It seemed so wrong, her identity subsumed by my Dad. They weren't even happy!
I remember thinking, I'm never ever going to do that.
When DD1 was born DP just started calling her by his name and said no. I gave birth, I carried her and gave up wine, French cheese while you consumed more of both. She will have both our names. I explained why, the history, my feelings. He was not happy.
We got engaged and then he said,now we can all have the same name. I said no again, we can double barrel, both of us. He again was really unhappy and asked me about the rest of my family, all of whom took their husbands name, same with the children. I said it's not about them, it's about me and he says it's about him, what will everybody say!
He then had a rant about feminism.
I pointed out that due to me assuming no man has to provide for me I had put all the money down for our house and he hadn't put down a penny.
We never got married. Phew.
In my daughter's class, only one other child has both parents names. They are married.
The rest, including the unmarried all have the Dad's name.
I am in the minority and this is London.