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