I have a bit of info on this surname. Scrip records on Joseph Ladouceur Sr [c.1780-18??] and Josephte Lapierre show three children - Augustin b.1817, Basile b.1835 and Marguerite b.1839. The Joseph Ladouceur [c.1819-?] Jr's mother is shown as Josephte Cardinal [c.1800-?]. She was born at Lac la Biche to Joseph Cardinal and Lisette ?