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In the article it reads:

Walloon in Walloon Brabant is likely one of the first uses of the word.

The aforesaid qoute and the whole article is lacking dates. Nowhere in the article does it mention when "Walloon Brabant" was recently invented. — Preceding unsigned comment added by 2A02:C7D:21B:D600:226:8FF:FEDC:FD74 ( talk) 17:07, 19 August 2016 (UTC) reply

I known the whole area has been Frenchified (and contrary to belief the aforesaid Frenchification is still ongoing) but it seems the imperialist Francophones didn't also forsee a name for the dwellers worked-off from the 'Walloon Brabant' name they cooked up in the 1990s. Anyway, haps 'Oullonz des Braibantesoise'?