I read this, and found myself nodding along.
Your name is your identity. The term for you is what situates you in the world. The cultural assumption that women will change their names upon marriage – the assumption that we'll even think about it, and be in a position where we make a "choice" of whether to keep our names or take our husbands' – cannot be without consequence. Part of how our brains function and make sense of a vast and confusing universe is by naming and categorizing. When women see our names as temporary or not really ours, and when we understand that part of being a woman is subsuming your own identity into our husband's, that impacts our perception of ourselves and our role in the world. It lessens the belief that our existence is valuable unto itself, and that as individuals we are already whole. It disassociates us from ourselves, and feeds into a female understanding of self as relational – we are not simply who we are, we are defined by our role as someone's wife or mother or daughter or sister.