Reviewing other data accrued, think I found a link...
Appears that your Pierre was the brother of Joseph [or Jean?] Athanase Ricard -- my g-g-grandfather. My information shows a Pierre Ricard, birthdate unknown, who married Lisa Berube in 1843. Pierre was the son of Jean-Baptiste Ricard, b. ca. 1778. Jean-Baptiste married twice: Marie Boire in 1796; Marguerite Chaloup [Chaloux?] in 1803. Jean-Baptiste had 11 children.
In addition to Pierre and Joseph Athanse, the children included Augustin, Cecile, Henriette, Joseph Osias, Marie Jovite, Pelagie, Rene Pierre (another of your Pierre's siblings), Maxime and Joseph.
Those 9 siblings married, respectively: Marie Boyer, 1839; Jean-Baptiste Chenard, 1822; Joseph Laroche, 1828; M.-Charlotte Senecal, 1827; Joseph Laforest, 1825; Joseph St.-Gemmes, 1837; Elixabeth Duebe, 1843; Salome Huot ou Guillotte, 1838; Onesime Trudeau, date unknown.
Joseph Athanase married Marguerite Trudeau, 1827. One of their eight children was my g-grandfather Pierre, b. 1854.