Queenie, I don't know if they match up with Theresa, but they match my Stevens/Cain families. The Census adds a number of children that I was not aware of - but then again I have yet to follow this side of the family very far. I ahve been researching Isaac's uncle, who is also an Isaac, but he was born in 1793, where his nephew was born in 1827.
Nancy Cain and Isaac Stevens were married Nov 18, 1849, in Grant County, Indiana .