Is this your Lillie -- from TX Dth Idx?
Rochelle, Lillie, d 26 Nov 1971 Dallas Co, TX; widowed.
If so, you can obtain a copy of her death certificate which should show the names of her parents.
And, since you know when and where Rayborn died, you could obtain his, too.
1920 census Nolan Co, TX:
Rochell(sic), Rabon(sic) D., h, 40 md, b TN, TN, TN
" Lillie, w, 24, md, b TX, Eng, OH
" William D., son, 4 11/12, b TX
" L_____, dau, ?, b TX
Lare, John, fth-in-law, 68, wid, b Eng, Eng, Eng
Rilley, E. A., lodger, ?0, sgl, b TN, TN, TN
Richardson, Perry, ?, 24, sgl, b TX, AL, TX
Riden, Will, lodger, 23, sgl, b ID, U.S., AL
[Rabon ginner, gin; John cook, pvt home; Perry teacher, school; Will ____ helper, rail road.]
The index shows father-in-law's name as Lare, handwriting hard to read.
Happy Hunting (^_^)