It's very frustrating being asked to justify your personal decisions in this way, and it's probably unsurprising that people are defensive about it. The more so because it's a guarantee no man will ever be asked to do the same. Nor are they likely - as happens to me - to be addressed as Mr Wifesname as long as 15 years after their marriage.
However, a lot of the women upthread have disclosed their reasons, and it's clear that the majority are not just borne of a desire to embrace or reject patriarchal traditions. There are all sorts of considerations people have made, and for the most part these are informed decisions. That's why I find it all the more interesting to understand the conditions under which these decisions are made.
@kittykat2000 - your situation with the registrar is nothing short of outrageous. Their attitude was rudeness and cheek beyond belief, particularly given that in unmarried couples it's only the mother who can register the child without the father's presence, not vice versa. I had a similar situation with my mother's death certificate. They were insistent on recording her occupation as 'wife of Mr Hisname, HIS occupation', rather then her own occupation. I was grieving and irrational, and admit that I blew my top. They were separated, he was an abusive bastard, and I knew my mum would be disgusted. People might well ask me 'your mother had just died, didn't you have more important things to worry about, especially given she was the last person in a position to care?' Well yes, I did have better things to do, but this was one of the last tasks I was ever able to perform for her, and given our family history it just felt like the final fucking insult. And it stung, beyond belief. It's nothing short than systemic sexism for any woman to be put in this position, and IMO, a disgraceful way to treat a grieving daughter. I truly hope that this system has been altered now.
As to the Hisname debacle which has really become an exercise in semantics upthread, yes, undeniably we have a patriarchal lineage recording every human's existence in this society. That ceases to be a patriarchal lineage once women: double-barrel their names, create a portmanteau of the two names, pluck a new name completely out of the air at random, or retain their own family names. It doesn't matter how you go about doing it. Once any of the above happens, the patriarchal naming system ceases to be patriarchal.
I don't want a new, made-up name. My whole stance is that, as a woman, there should be no greater obligation for me to relinquish MY own identity on marriage, than there is for a man. It was my family name I wanted to retain; my history bound up with my name; my identity I didn't want to cast completely to one side because I'd chosen to commit formally to one partner for life.
My name is my name. It's on loan to me from no one. And ironically, I've achieved far more recognition under that name than my father ever managed in his lifetime. From his perspective that would irk him no end, and I'm not sorry.