It doesn't put names in there because the numbers are clickable and go to the person in the list. For instance, in my Ancestor list, my father is #3. His mother is #5, and it says against her name she is the mother of 3. "3" is clickable and goes back to my father. So I don't have to rewrite his name.
It is different if you have printed it out, as it is with anything printed out. If I have put a URL in there, then you can 'click through' when it is on screen, but when it is printed out, you can't, and no software I know of will call it by a different name.