Brenda, I looked for a marriage for either Nathaniel or Reuben Jellison in my Marriage Records of Hancock County.

I did find one reference to Reuben Jellison: He performed the marriage of Orrin Frost of Mariaville & Brenda Carr of same on 15 Dec 1843.

So perhaps the records of Mariaville might have furthr information about Reuben's family?