I know that you are mostly interested in the descendents of Albert Bueche and making some connections to other Bueche/Toney names but since you guessed at his parents names I thought that I could give you some information. I have been researching the Bonaventure surname and the Valentine that you mention is most likely Aurelien Bonaventure (I have seen his name spelled many different ways!!). He died May 27, 1853 and his last daughter with Constance Olinde was born September 20, 1853, Marie Aureline Bonaventure. Marie Aureline married Albert Bueche and according to the DOBR, his parents were Pierre Bueche and Irma David. Here are the sources.
Marie Aureline (Valerien Bonaventure, decd. and Constance OLINDE) m. 22 Sept. 1870 Albert BUECHE (Pierre Bueche, decd. and Irma DAVID) wit. P. David, Jr.; Jules Guidroz; Chs. T. Lebeau (IMCL-1, 111) DOBR Catholic Church Records, Volume 11, page 69
Marie Aureline (Aurelien Bonnaventure and Constance OLINDE) bn. 20 Sept. 1853 bt. 24 Nov. 1853 spo. Gustave St. Romain and Clara Bueche (PCP-10, 196) DOBR Catholic Church Records, Volume 8, page 76
Aurelien Bonaventure, age ca. 40 years bur. 28 May 1853 (PCP-11, 117) DOBR Catholic Church Records, Volume 8, page 76
P.S. Aurelien is my 4th great grandfather. My email is firstname.lastname@example.org