I can back up the guillotine thing, we've got one at our house. I wonder if that word existed before the French Revolution? If I remember, I'll ask the wife
Named for Joseph-Ignace Guillotin, a French doctor who wanted all executions to be done using a quick beheading method... he claimed it was the most humane means of execution, which to be fair in a time of immolations and draw-and-quartering, it probably was. It was introduced during the French Revolution, though, so the answer to your question is "no."
I'm sure your wife knows all this, it's taught in French schools
ETA: Pronounced /ɡijɔtin/, gee-yo-teen, not /ˈɡɪlətiːn/ gill-uh-teen, as the British say. The British butchering of French words is a pet peeve of mine.