John,
If you excuse the spelling, I think these are your Grandparents listed in this 1890 Census.
VAIDER, VIRGINIA H MS DE SOTO
VAIDERE, POTTER F MS DE SOTO
Source:
http://ftp.rootsweb.com/pub/usgenweb/ms/tallahatchie/military/civilwar/1890veti.txt
Hope this helps,
Mitchell