There is a Gurtman family with a son Lewis age 3 in 1910:

Name: Parris Gurtman
Age in 1910: 34
Estimated birth year: abt 1876
Birthplace: Texas
Home in 1910: 1 J-Pct, Austin, Texas
Race: Colored
Gender: Male

wife Hattie 30
Kate 12
Henderson 8
Eula or Sula or Bula 7

in 1920:

Name: Lewis Girtman
Age: 13 years
Estimated birth year: abt 1907
Birthplace: Texas
Race: Black
Home in 1920: Justice Precinct 1, Austin, Texas
Sex: Male
Marital status: Single
Relation to Head of House: Son
Able to read: Yes
Able to Write: Yes
Mother's Birth Place: Texas
Father's Birth Place: Texas
Image: 814

listed as son of Sam and Hattie Ross (who are listed as white)