The parents of Theodore are Jacques Gibeau and Angélique Perras (married in St-Constant August 18th, 1828) Theodore was born 11 july 1844 in St-Chrysostome and baptized the following day. He died in Lachine, Que. on January 18th, 1925.
for the wife the only thing I can assure is tha Boyer is the family name and not Royer.
Also I fond some Boyer families living near the sisters of Theodore Boyer in St-Chrysosotome(sources : 1901 Canadian census) but after searching for her baptism in St-Constant nothing... She might be a grand-daughter of Francois Boyer and Isabelle Letourneau of St-Constant they had 7 sons and their names are : Joseph Boyer married to Adeline Cardinal Francois Boyer married to Olive Gervais Cajetean Boyer married to Emerande Gervais Vital Boyer married to Sophronie Gibeau Louis Boyer married to Lina Pagé Jean-Baptiste Boyer married to Clemence Ste-Marie Olivier Boyer married to Marie Viau
the witness at Theodore Gibeau could have been C( for Cajetean Boyer and also Jean-Baptiste Boyer lived besides the two daughters of Theodore Gibeau in St-Chrysostome.
But for now there is not enough proofs to say which are the parents of Marie Boyer but if I find them I will contact you.