you dont say what records you have so here is what i found
1910 United States Federal Census

Name: Ruth Thomas
Age in 1910: 6
Estimated birth year: abt 1904
Birthplace: Missouri
Relation to Head of House: Daughter
Father's name: Edward A
Father's Birth Place: Tennessee
Mother's name: Nettie
Mother's Birth Place: Missouri
Home in 1910: Justice Precinct 2, Jasper, Texas
Marital Status: Single
Race: White
Gender: Female

Household Members: Name Age
Edward A Thomas 34
Nettie Thomas 30
Edward Thomas 10
Blanche Thomas 8
Ruth Thomas 6
Raymond Thomas 5
Benjamin Webb 28


unsure if this is them
1900 United States Federal Census
THEY HAD BEEN MARRIED 2 YEARS WHICH FITS
Name: Nettie Thomas
Home in 1900: Louisville Ward 11, Jefferson, Kentucky
Age: 30
Estimated birth year: abt 1870
Birthplace: Kentucky
Relationship to head-of-house: Wife
Spouse's name: Edward
Race: White
Household Members: Name Age
Edward Thomas 24
Nettie Thomas 30
Claude D Merritt 45
Sallie B Merritt 37

DID THECHILDREN TAKE ON THE GREEN NAME ?