Some utter hoof-wank on this thread, mainly from non-adopters.
OP, I adopted because I wanted to be a parent, and not because I am a self-flagellating martyr on a mission to rescue children. Seven years in, I have sacrificed my career, my life-savings, and much of my sanity battling professionals for appropriate support for my child whose life will be forever defined by the trauma and neglect she experienced at the hands of her birth parents. I think I have amply demonstrated I am capable of consistently putting my child's needs first and should not be restricted to keeping a pet because I had the temerity to question received wisdom about the importance or otherwise of an adopted child keeping their original name.
To illustrate, a conversation in a typical mumsnetter household might go something along these lines: "mummy, where did my name come from?" "Well, darling, daddy and I were so excited once we found out we were expecting you we spent weeks poring over a baby names book, but we decided to name you after your great-great-great-great grandmother who was a feted society beauty and marched with Emmeline Pankhurst in the battle for women's suffrage." Subtext: "We wanted a name that would link to our family's heritage, was not too vulgar or common, wouldn't cause sniggers or raised eyebrows when we shout it in the park and would be suitable for when you fulfil our expectations of becoming a partner in a Big Four law firm."
Conversation in libbitybibbity's house: "Well, it was actually your mother's pimp/groomer who gave you the names PrincessPorscheMercedesCarreraCortina before he persuaded her to abandon you in scub, where you were being weaned off your addictions to drugs and alcohol so he could traffick her into another county to be gang-raped for money. He said he liked cars. The social workers, yes, the ones who failed to protect your sibling from serious harm, were determined your name could not be changed. I don't think they considered your visual impairment (caused by your mother's consumption of heroin, methadone, crack cocaine, cannabis & non-prescribed anti-depressants), your fas, your lifelong learning disabilities and mental health issues enough of a family legacy for you. I hope that one day you will be able to look them in the eye and explain you have enough daily reminders of what your birth mother and father passed onto you."
OP, get yourself registered on the adoptionuk website to talk to adopters, both experienced and prospective, for a more informed debate.