Thank you for these suggestions, Roxanne. They give me hope and ideas. I had never heard of the Presbyterian Historical Society, but I will look it up, and I will follow through on researching the 2 families you suggest also. (The name Eliza Eakin is penciled in a margin of a book of bound 1824 Delaware Gazettes which I inherited; but I have no way of knowing when or why the name was scribbled there. Your mention of her suggests that Joseph Eakin's family may be the one I am searching for.)
Again, thank you.