There was a French money lender named Boulanger who sued Talleyrand's brother in London in 1797. Boulanger had borrowed a VERY LARGE sum of money from that Boulanger. Talleyrand vs. Boulanger is famous it seems in English and American Law, setting some kind of precedent about suing in domestic courts over matters of the breaking of foreign law.
There was an Antonio Boulanger in Paris in the 1770s and he was the one from whom we get the word "restaurant." Wouldn't that be a hoot, if Edouard the pianist, accompanist of Catherine Hayes, pupil of Chopin, teacher, traveller and composer was the grandson/son of the original inventor of a comestible house of restoration? I'd like that.