::::::::Bradipus, if you want to create an article on all these meanings of Wallonia you think they exist, go ahead. Create Wallonia (historical region) or Wallonia (French-speaking region) if you think you have enough material to put inthere. But you cannot put on the side of the road all these encyclopedias, dictionnaries, official websites, daily newspapers, advertisemnts, border signs which tell us that in 2008 Wallonia is the short form for Walloon Region (this region wouldn't be Wallooon if she wasn't built on Wallonia). I agree that the territory of Wallonia has changed with years, that happens to every country, but do they change their country's name each time a portion of territory is added or removed ? Francs is still France with or without Alsace-Lorraine, Ireland is still Ireland without Northern Ireland... 
 ::::::::I repeat, I have bring a lot of sources. Can you do the same for your POV ?