Google Maps (https://www.google.be/maps/place/Av.+des+Fr%C3%A8res+Rimbaut,+7500+Tournai/@50.6044156,3.381116,18.17z/data=!4m6!3m5!1s0x47c2dfd94cbb9e3d:0x651ba733f5a899af!8m2!3d50.6043349!4d3.3820064!16s%2Fg%2F1tc_ddv1?entry=ttu&g_ep=EgoyMDI0MTAwMS4wIKXMDSoASAFQAw%3D%3D) treats the parallel road of Boulevard Bara on the western side as Avenue des Frères Rimbaut. It's not an acceptable source, but the name does seem to be in use on some websites too.

Not sure what to do here apart from contacting the municipality.