ok, going to go through all the baptisms I find, keep in mind that OKA was a mission and the records for it are sometimes fragmentary. And those that are there sometimes skimp on details, the missionnaries serving it were not all up to snuff.
1) Marie Cécile, natural child, b 7 Nov 1790 bapt. 4 Jan 1791 godparents Ferreol Doucet & Marie Cécile Forgette
2) Joseph, b 22 Oct 1792 bapt 24 godparents Étienne Robidou & Suzanne __ (scribbled)
3) Euphrosine, b & bapt 22 Feb 1797 Oka (noted as residents of Vaudreuil), godparents Louis Laroque & Marianne St-Michel
4) Marie Anne, b 22 Jul 1799 bapt 23 (again residents of Vaudreuil) godparents Étienne Peron & Josephte Gagnon
5) Hubert, b 13 Jul 1800 bapt. 14 (of Vaudreuil parish, note in margin of grasse __ (? Rivière La Graisse?)) godparents François Gagnon & Marie Louise Guilbeau (mother recorded as Barbe Robidoux)
Marriages:
1) Ursule, ''aged 19'', marries François Brunet, consanguinity noted, 24 Oct 1808 Ste-Madeleine-de-Rigaud (François son of Pascal Brunet dit Létang & Marie Josephe Sabourin) dispensation for 3rd degree of relationship; Ursule, widow of François Létang, remarried 30 Nov 1837 in Ottawa (Notre-Dame) with Joseph Ménard, widower of Susanne Boyle
2) Hubert married Rose Couvret 27 Aug 1821 Ste-Madeleine-de-Rigaud
Funerals
1) François Xavier, aged 3 years and 9 months buried in Montréal (ND) 9 Dec 1818, looks like this one is not theirs, mother listed as Marguerite Robidoux and they are said to be of that parish.
2) Euphrosine, died at ''24'' 6 Apr 1821 buried 7th Ste-Madeleine-de-Rigaud; her brother-in-law François Brunet is cited present.
Ursule is definitely their daughter. No baptism found for her,
On Françoise Ladouceur, the family's original name is Lamagdeleine, Ladouceur being their ''dit'' name. She married Louis Laroquebrune (which gets shortened to Laroque sometimes) 20 Feb 1764 in Ste-Anne-de-Bellevue, and cited present was Louis Lamadeleine her cousin.