There is actually a town in France called Esmoulins. Is it possible that although Michel may have been born in Paris his family may have been from Esmoulins (about three hours from Paris). Thus Michel Robineau from Esmoulins would be Michel Robineau de Esmoulins or Michel Robineau d”esmoulins (Desmoulins). It is a stretch since in the 1600′s people did not generally move very far from where they were born..
Of course, Esmoulins is 3 hours from Paris… today!. The distance is about 300 kilometers. Travelling 300 kilometers in the mid 1600′s would have been considerably more than three hours of travel. This might be a case of “Theory…Busted”