You didn't state what records you had already- but here's what I found:

Found in 1900 census index:
Name: ??Dy Brister
Home in 1900: Beat 2, Bolivar, Mississippi
Age: 6
Estimated birth year: abt 1894
Birthplace: Mississippi
Relationship to head-of-house: Daughter
Father's name: Henry J
Mother's name: L??Der
Race: Black
Occupation: View image
Neighbors: View others on page
Household Members: Name Age
Henry J Barn?? 40
L??Der Barn?? 39
Lony Brister 21
??Dy Brister 6
Ban?? 6
??Y Brister 2

Hard to read but record says Lucindy Brister

1910 makes it clear that her mother is in second marriage to a Barnes
M 2 - 10 years 12 children born - 7 living
1910:
Name: Lucinda Brisco
[Lucindy Brister]
Age in 1910: 15
Estimated birth year: abt 1895
Birthplace: Mississippi
Relation to Head of House: Daughter
Father's Birth Place: Mississippi
Mother's name: Lucinda
Mother's Birth Place: Mississippi
Home in 1910: Shelby, Bolivar, Mississippi
Marital Status: Single
Race: Black
Gender: Female

Household Members: Name Age
Lucinda Barnes 49
Arduino Brester 20
Lucinda Brisco 15
Benjamin Brister 13

Draft record for her brother shows mother as Lucinda Barnes

Name: Benjamin Brister
City: Not Stated
County: Bolivar
State: Mississippi
Birth Date: 15 Sep 1897
Race: Black
Roll: 1682703
DraftBoard: 2

1930 census:

Name: Lucindy Washington
Home in 1930: Beat 5, Bolivar, Mississippi
Age: 36
Estimated birth year: abt 1894
Relation to Head of House: Wife
Spouse's name: Jacob

Household Members: Name Age
Jacob Washington 54
Lucindy Washington 36
Annie M Washington 16
Bell Washington 13
Mammie Washington 5