A friend of mine is transsexual. She recently changed her legal name from, let's say, John to Jane.
In the company where she works, when somebody changes either their first or last name, the old name is still displayed in brackets next to their last name. So her name in all emails is displayed as "Jane (John) Smith". It stays like this as long as the person works for this company, it's supposed to make it easy for colleagues to find this person if they are not aware of the change.
She doesn't want everyone including new colleagues and clients to know than she was called John before, for obvious reasons. What would be the best way to explain that to HR in order to convince them to remove the old name?