YDNA confirms that J. T. Hopper in the 1880 Census in Grayson Co, TX is James Taylor Hopper, son of John and Patsy Lemarr Hopper of Claiborne Co TN, and grandson of Harmon and Sally Cole Hopper (born Faquier Co VA, died Claiborne Co TN).
YDNA submitted by my wife's cousin John Jackson Hopper Jr, son of John Jackson Hopper Sr, grandson of Albert Sheppard Hopper, great-grandson of James Taylor (J.T.) Hopper, etc.
Albert Sheppard Hopper, grandfather of John Jackson Hopper Jr and my wife, Mary Elizabeth Hopper Benson, was born in 1881, younger brother ofJoseph Nathaniel (Joe) Hopper and Allen Hopper.
After the 1880 Census J. T. Hopper and his family - which included his step children, childen of John Henry Rives (Reeves) and Mary Elizabeth Jones Rives (Reeves) Hopper, Beulah Benton Rives, Effie Mae Rives, Wiliam Henry Rives, Haywood Rives and John Walter Wives - moved from Kentuckytown, Grayson Co, TX to Valley View, Cooke County, TX.
I have been unable to find J. T. Hopper's exact death date and burial place. J. T. Hopper executed a legal document on 4 April 1893. His wife Mary Elizabeth is a widow in the 1900 Census living with her son Joe N. Hopper in Justice Precinct 6, Cooke Co, Texas.
I am happy to share more information, Please contact me at me regular email. Ned H. Benson email@example.com