You kinda have it backwards.

Marie Jeanne Nancy Chevis, born Abt. 1790 was the daughter of Jean Chevis. She married Louis Honore Gradenigo, born, Abt. 1790, according to the 1850 census.

1850 United States Federal Census
*Honore Gradenigo is living next to Jean Allain

Name: Honore Gradenigs
Age: 60
Estimated birth year: abt 1790
Birth Place: Louisiana
Race: Mulatto
Gender: Male
Home in 1850
(City,County,State): St Landry, Louisiana
Neighbors: View others on page
Household Members: Name Age Sex
Honore Gradenigs 60 M
Nancy Gradenigs 51 F
Delia Gradenigs 25 F
Jeane Gradenigs 19 F
Louis Gradenigs 16 M
Honore Gradenigs 13 M
Augustin Gradenigs 10 M
Joseph Gradenigs 7 M
Kinont Gradenigs 4 M
Benjamin Gradenigs 1 M

Dehia Gradenigo, born Abt. 1832 was their daughter. She married Joachim Esprit, born Abt. 1821.

1860 United States Federal Census

Name: Dilia Gradenige
Age in 1860: 28
Birth Year: abt 1832
Birthplace: Saint Landry
Home in 1860: Opelousas, St Landry, Louisiana
Race: Mulatto
Gender: Female
Post Office: Grand Coteau
Value of real estate: View image
Household Members: Name Age
Joichim Esprit 35
Dilia Gradenige 28
Ursule Esprit 6
Amente Esprit 4
Olimpe Esprit 3
Mary Sova Esprit 1