Hi Amiina
This is a great question.
Well, my old name was a very classic male name. No way to see a female part in or near it.
So I really really had to change it and I did so. I did it the legal way......new passport, new driving license, in every single document.
For to do so was a lawyer needed
-I can tell you absolutely required-
It also means I had to pay for all of that, the lawyer, the court procedure, every letter or document and after all of course for all the new documents like passport, driving license......
it was a very expensive matter!
So if you are able to use your old name and you are happy with it, you must be a very happy girl.