Was `rapporteur' his actual English language title, or is there a better translation? It seems to correspond to the sponsor or original author of a bill.
Besides, it was French that shamelessly ripped off Vulgar Latin (re + portare, "to carry back")!
"The problem with defending the purity of the English language is that English is about as pure as a cribhouse whore. We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat them unconscious and rifle their pockets for new vocabulary." - http://en.wikiquote.org/wiki/James_Nicoll