IGI lists the following record:
Christening: 26 Jun 1779
Sainte Genevieve, Ste Genevieve, Missouri
Father: Jean_ Bte PRATTE
Mother: Marie Therese BILLERON
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The following probably has nothing to do with this couple, but I didn’t know where to park it.
From Ancestry.com: Missouri marriage records to 1850
Marriage record may belong to Jean:
Duclos, Aspasie married Pratte, Jean Baptiste on 17 Jun 1834 in Washington County, Missouri

Also the aspasie Duclos marriage produced 2 children that were listed at the following web site:
St. Joachim Church - Washington County, MO

PARTIAL LIST OF BAPTISM RECORDS 1820 - 1899
Microfilmed Records at the St Louis County library
Jean Baptiste Philomene PRATTE, b. August 27, 1835, bapt. October 10, 1835 s/o Jean Baptiste Pratte and Aspasie Duclos
Henry Joseph PRATTE, b. May 23, 1839, s/o Jean Baptiste Pratte and Aspasie Duclou

Marriage record same church:
June 17, 1834
Jean Baptiste Pratte, s/o Jean Baptiste and Marguerite Boyer
and
Aspasie Duclou, d/o Alexandre and Julie Boyer