The Desilets name was "invented" in Quebec, 3 times, differently. 1? Some Huard became Desilet and this line has disappeared. 2? Some Mousseau toke the Desilets surname in the St-Sulpice and L'Assomption area and account for about 10?% of today's Desilets. 3? A son of Antoine Desrosiers, Michel, married in 1679, went to live on the shore of the St. Lawrence near Trois-Rivi?res in front of small islands (in French, islets) and he was said to be "Des Islets" (from the islands). His descendants all took Desilets as a surname and they make the other 90?%.