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
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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.