Or, you know, ask them?
Or even make a thread yourself in the spam section.
OR do what you said and look at their last created thread asking for a name change and Liz says their previous name after she changes it.
I mean, there should be a thread where people can post their old username before they requested to change it, because it's very, very, very confusing when I see someone but don't know who they are but then realize I do know them, they just requested a name change.. and yes I know, you can just go to profile edit section and see for yourself, but not everyone wants to do that.
Or, you know, ask them?
Or even make a thread yourself in the spam section.
OR do what you said and look at their last created thread asking for a name change and Liz says their previous name after she changes it.