Agnes Gordon was mentioned in the 21 March 1815 will of her father Robert Gordon. She was to receive a portion of the estate. [Essex County, Virginia, Will Book 18, pages 149–150.]

In an undated petition, orator William Gordon with the will annexed of Robert Gordon complained that Rachel Gordon mother of the sd Robert died in 1815 intestate. Robert’s legacies went to Sophronia, Laura, Threshley and Agnes. Sophronia and Threshley died soon after the death of their father. [Essex County, Virginia, Box Chancery No. 37, item 37-F-21.]

1850 U.S. Census, Essex County, Virginia
Dwelling 526, Family 526
Cox, George, 40, male, carpenter, $125 real estate, born in Virginia, unable to read or write
Cox, Agness, 38, female, born in Virginia
Cox, James, 16, male, born in Virginia
Cox, Ennis, 12, male, born in Virginia
Cox, John, 7, male, born in Virginia
Cox, Adeline, 5, female, born in Virginia
Cox, Anna, 8/12, female, born in Virginia

1880 U.S. Census, Essex County, Virginia, Center Cross Precinct
Enumeration District 22, Sheet 7
Dwelling 70, Family 71
Cox, Agnes, white, female, 70, widowed, keeping house, cannot read or write, born in Virginia, both parents born in Virginia
Cox, Adline, white, female, 37, daughter, single, at home, born in Virginia, both parents born in Virginia
Cox, Alex, white, male, 22, son, single, farmer, born in Virginia, both parents born in Virginia