If you go to www.familysearch.org, you will come to the Mormon genealogy search site. If you type in Salois and then when it opens, on the right hand side, choose North America, you will find a number of Salois-dit-Caya from Quebec. I know from my own research on the Salois line that they ARE descended from Claude. We all are; he seems to be the only Salois who ever migrated to Canada.
Be sure to check the Salois genforum and also Salway. Most of the latter are English but if you use the search feature within the site you will find a little on Salois, some posted by me. My Salois moved into NH for a couple of generations and turned into Salway. How about yours? (If you reply, write me at Sue4711@AOL.com, because I seldom come to this name page, as my Salois didn't have the dit name Caya.