Not a chapter, but a question about the naming of the clones in my story

One of my readers has suggested to me that the names of the clones are hard to remember, so I should just use the same name as the original with some add-ons to help tell the clone and the original apart.

So I want more of my readers opinions to help me decide regarding the naming of the clones from now on.

Should they have the same name as the original but only add (C) to the front of the clone's name when the original is present at the same time?

Or should they have a new name but have an author note to tell them who they are a clone of?