Page 138 shows Etienne in his second marriage to Josephte Groleau in 1804 at Saint-Joseph. You can trace his ancestors from this. But I could not find his descendants. In contrast, the chapter gives details on the families of all four of Etienne's male siblings. Most, if not all, of his nephews and nieces married in the Beauce County area. This may be the distinction between these people and any descendants of Etienne. I quickly browsed succeeding chapters for the names you want. But the way the book is organized, one would have to eye-ball every name which appears in bold type to ensure that the book does not contain the names.
There are only two details on Etienne. Elected "marguiller," church warden in 1781. Died 20 March 1819 at age 78 and buried at St-Joseph.