According to her death certificate, her parents were George Williams and Mary Bever. The marriage record also noted below might be her parents. Do you know the names of any of her siblings? There are several other TX deaths listing parents as George Williams and Mary Bever/Beever/Beavers- most of those children were born in AR - including Robert Sims Williams, Massie Donnie Hughes, Jennie Alice Compton?
Texas, Deaths, 1890-1976
Citing this Record "Texas, Deaths, 1890-1976," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/JDJZ-T84
Name: Fannie May Hughes
Death 27 Mar 1961 Dallas, Dallas, Texas
Female White Age 86 years Widowed
Birth Date: 05 Nov 1874 Tenn.
Marital Status: Widowed
Spouse's Name:
Father's Name: George Williams
Father's Birthplace:
Mother's Name: Mary Bevers
Mother's Birthplace:
Occupation: Housewife
Residence Place: Dallas, Dallas, Texas
Cemetery Big A Cemetery
Burial Date: 27 Mar 1961 Near Garland, Texas
Informant's Duaghter: Mrs. Azalee Hobbs
GS Film number: 2116711
Digital Folder Number: 4166575
Image Number: 00000398
Reference ID: CN 13886
Tennessee, Marriages, 1796-1950 "Tennessee, Marriages, 1796-1950," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XDQ3-3PB
Name: G. H. Williams
Spouse M. G. Beavers
Marriage 01 Nov 1866 Giles,TN
Indexing Project (Batch) Number: M51922-1
Other TX deaths that may or may not be related:
https://familysearch.org/search/record/results#count=20&query=%2Bgivenname%3Ageorge~%20%2Bsurname%3Awilliams~%20%2Bbirth_year%3A1835-1860~%20%2Bspouse_givenname%3Amary~%20%2Bspouse_surname%3Abeaver~
