We kept or our son's names and added a family middle name and our surname. Personally, I am glad we did this but still nervous about social media etc in the future. For me this is the big issue and not how much you like a name.
We did this because there were no risks, as far as we could tell (and we did have evidence for tgud) of him bring in danger etc.
I think if there are risks of the child being identified then changing their name is part of protecting them.
OMHO all children actually get a lot of things from both birth parents. They get DNA, hair, skin and eye colour, medical history, in vitro experiences, early life experiences etc.
The name given by birth parents is just part of what makes up children and if that name might cause them to be bullied or singled out, or identified, then I would say it's totally right to change it.
You are right about social workers that it is best not to speak to social workers about it. On my experience they are very investiged on not chsmgong kids names.
However, I agree with others that if it is simply your desire to name the child, add a middle name.
If you do not think their name fits your family you may need to re-think the grieving process of not naming a birth child.
Good luck, hope it all goes really well.