Kristine...The only Gilles LaPlante I am aware of in the Three Rivers area around the time you mention is my ancester Gilles Badaillac dit LaPlante who was born in Sorel in 1682, son of Louis Badaillac (Carignan Soldier) and Catherine (Lawlor) Delolore (Fille d'Roi) He married Francoise Giguire in 1705 and their fourth child was name Gilles. Gilles, the father, was buried at St Michel d'Yamaska in 1769. I've seen his burial record. It had written nest to it 105?! years old. He was actually 87. Hope this helps.