....and when you make an alias, there will be a little curved black arrow in the lower left corner of the icon. Say the name of the file or folder that you make the alias from is Pseudonym. The name of the alias will then be Pseudonym alais. Anytime you double click on Pseudonym alias, Pseudonym (the original) will open. You can change the name of Pseudonym alias to anything you want, say "Surname" or even your surname. Whenever you double click on Surname, Pseudonym will still open.
Of course the purpose of the alias is to place it somewhere more accessible to you than the original so that you don't have to go hunting for it. Once you've moved Pseudonym alias you can rename it to Pseudonym if you want. But you can't do that in the same folder as the original.