How to replace the usernames in page users?

Question

I am trying to replace the usernames by name data from the userprofile (or usermeta).

This however seems not to be that easy.

The users page uses qa_userids_to_handles(). This one however can not be overriden as far as I can see.

So my question is, how to replace those usernames then.

 

Structure: <a href="./user/registerusername" class="qa-user-link">Set Username</a>

Example: <a href="./user/mark123" class="qa-user-link">Mark Twain</a>

Comments

I think the easiest place would be the theme.

---

like checking for the request or template and then ... where to modify it?