wife of Richard de Camville

She may (or may not) have been born in Brabant, but she cannot have been Duchess of Brabant - the Duchy was not established until 1183. https://en.wikipedia.org/wiki/Duchy_of_Brabant http://fmg.ac/Projects/MedLands/BRABANT,%20LOUVAIN.htm#_Toc420828352

The Brabant link is more likely due to confusion with Melicent de Rethel, who was the second cousin of ADELISA de Louvain, daughter of GODEFROI V "le Barbu" Duke of Lower Lotharingia, second wife of Henry I of England. (The precise nature of the relationship is a bit uncertain.)