Oh, you are going to be so happy the family you found was correct, Frances was a brother!!! Suzanne King 3/4 way down page ( or use keyword Boniface in the upper middle find next on page )
http://www.nbgs.ca/firstfamilies/FAMILY-K-2006.pdfJoseph Roy or King b. Feb 19 1792, parents Charles Boniface Roy & Helene Ann Martin
married June 5 1816 to
Marie Madeleine Bouchard b. Nov. 5 1790 La Pocatiere, parents Joseph Antoine Bouchard & Marie Joseph(te) Moreau
Suzanne August 9 1826 other siblings on page!!
Was Marie Elizabeth who married Joseph a sister of Asaiah? Perhaps she can be followed to connect her, at least that would be a start of help if same family. I am also at a loss as to why Isaac King is in her household as he seems to not be a close relative...