One of Nancy's supposed 3rd Great Grandfathers is a man by the name of Jackson Dunn. He apparently was born in 1810 in Stewart, TN and married a woman by the name of Sara E. Stoneham who was from Kentucky.
In order to do a proper genealogy, it's best to understand where these people were from. According to the Stewart County, Tennessee Genealogy website, Stewart County is bordered to the north by Trigg County, Kentucky. According to the Brazzell, Shipman, McKinley Family Tree, both Jackson Dunn and Sara E. Stoneham lived their final years and died in Trigg County, KY.
Click on Here to read a Stewart County timeline.
The 1820 United States Census shows only the names of the heads of families, and not every individual person living in the households. Instead, it lists the number of males and females within certain date ranges that live in the household. As such, it is nearly impossible to figure out who lived in which home.
If Jackson Dunn was born in Stewart County, Tennessee in 1810, it may be assumed that his family may have still been living there in 1820. There are five Dunn families living in the county at that time that have boys around Jackson's age:
Josiah Dunn: 2 males ages 0-10
John Dunn: 2 males ages 10-16
Benjamin Dunn: 1 male age 0-10
Thomas Dunn: 3 males age 0-10; 1 male age 10-16
Thomas Dunn, Jr.: 1 male age 0-10
Source: Transcription: Stewart County 1820 Census