It appears that her parents were John George Featherstone and Gertrude E (unk). Maybe you can locate her birth record from Sept 1904 in Newport, RI and find her mothers maiden name?
Texas, Birth Certificates
https://familysearch.org/pal:/MM9.3.1/TH-1-17252-95074-13?cc=1803956
Douglas Glen Ludlam
Birth 11 Oct 1929 El Paso, TX
Father: Douglas Glen Ludlam
US Army Age 24 Birth RI
Mother: Margaret Edith Featherston
Age 24 Birth RI
https://familysearch.org/search/records/index#count=20&query=%2Bsurname%3Afeatherstone~%20%2Bresidence_place%3A%22Newport%2C%20RI%22~%20%2Bresidence_year%3A1905-1905
R I State Census, 1905
Wife Gertrude Featherstone 24 F Oct 1, 1881 Eng
Dau Margaret E Featherstone 9 m F Sept 14, 1904 Newport, RI
Dau Maud Featherstone 2 F Dec 14, 1903 NY
U S Census 1910 Newport Ward 5, Newport, RI
SELF John G Featherstone M 34y NY
WIFE Gertrude Featherstone F 28y Eng
DAU Maude L Featherstone F 7y NY
DAU Margaret E Featherstone F 5y RI
U S Census, 1920 Philadelphia, PA
SELF George Featherstone M 42y NY
WIFE Gertrude Featherstone F 38y Eng
DAU Maud Featherstone F 17y NY
DAU Margaret Featherstone F 16y RI
DAU France Featherstone F 7y NY