Looking for Cato of Indiana

I am "so very stuck"... I am trying to find info about my great-grandparents, and this is what I have so far.
>>>>>>JOHN CATO
b 1809 Indiana
m Lucy ?

>>>>>>LUCY CATO
b 1812 Tennessee

I keep thinking there has to be information somewhere--I'm just not seeking the right resources.

Thx,
Clarene