I have a John T Adams married to a Cora E. I do not know where they married however this ADAMS family lived originally in Goliad, then Bee, then Live Oak and ultimately in Dimmit county where John T died sometime between the 1910 and 1920 census. They lost thier 1st 2 infants sons, tried again and had 2 more. The last birth was a son they named VIVIAN/VIVION!!!!
It seems to me that CORA's maiden name was most likely VIVIAN/VIVION, and the proximity of the 2 families seems to cement the hunch.