It was 2011 or 2012 when admins completely stopped logging name changes they did so the only list that exists now was last edited several years ago (note that it also lacked lots of namechanges made even for that period).
Creating a list that'd be accurate an up-to-date would require more work than you thin and as it's main point to exist is "why not?" it's probably not going to happen. Some time ago ViperTech was coding a tool that was showing whether a certain user had a name change or not but it was scrapped and I'm not sure if it's ever going to be finished.

Nice idea but too much work. If we had all namechanges logged that wouldn't be a problem, but unfortunately we don't (unlike with the list of all staff where people actually paid time to add ex-members every now and then).