Constancia Elizabeth Landry
- Born: Abt 1788, Ascension Parish, Louisiana
- Baptized: 17 Feb 1788, Ascension Parish, Louisiana
- Marriage: Etienne Dupuis 4 Jul 1808, Assumption Parish, Louisiana
Constancia married Etienne Dupuis on 4 Jul 1808 in Assumption Parish, Louisiana. (Etienne Dupuis was born on 24 Feb 1788 in Ascension Parish, Louisiana, baptized on 24 Mar 1788 in Assumption Parish, Louisiana, died on 15 Jan 1827 in Assumption Parish, Louisiana and was buried on 15 Jan 1827 in Assumption Parish, Louisiana.)
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