In the 1850 census of Union township, Washington Co., MO, living in Jean Baptiste's (spelled John B OBuchon) household were three young women for which I have not found baptismal records to match. They are Julian, age 20; Elenora, age 18; and Disley, age 16.
The 1860 census records Celeste's name as Sarah. This probably indicates that her middle name is Sarah; Celeste Sarah Roussin.
In the 1850 census of Union township, Washington Co., MO, Marie (spelled Mary OBuchon) was living in the household of Jean Baptiste Aubuchon (spelled John B. OBuchon) and age was recorded as 26 years old.
Marie Theresa does not show up on the 1850 census. It is highly possible she died prior to 1850.
This is speculation that this is the Marie Aubuchon mentioned in the Church of Ste. Genevieve vital records. She died at age 2.
Basile and Adelaide AuBuchon, were residents of Ste. Genevieve County September 18, 1817, when Bazile their son was born, and in 1826, they moved to St. Francois County, near French Village, and engaged in farming. In 1832 Adelaide died, leaving five sons. Basile married again in 1838. He reached the advanced years so notable in this family, dying at the age of seventy-four years in February, 1864.
[History of Southeast Missouri, Goodspeed Publishing Co., 1888, pg. 620, Source Media Type: Book]
The 1860 census for Liberty, St. Francois Co., MO, records Eliza, age 25 in the household of Adolph Aubuchon (Louis Adolphe Aubuchon) who would have been her half brother. Also living in the same household was Bazile Aubuchon the father of both.