Harriet Tillotson's father was James Tillotson (b: 13 Oct 1811 in South Carolina; d: 29 Apr 1887 in South Carolina) of Spartanburg, South Carolina, and her mother was Elizabeth Betsy McAbee Tillotson (b: 30 Apr 1812 in South Carolina; d: 20 Sept 1897 in South Carolina) of Spartanburg, South Carolina.

Some of the old minutes of the Sabbath School of Cannon's Campground Methodist Church in Cowpens, Spartanburg County, South Carolina, can be found in the archives of the church. These minutes were handwritten. The minutes of 24 June 1866 list the officers, teachers, and assistant teachers. Miss Harriet Tillotson is listed as a Sabbath Day Teacher.

"Minutes: of the Sabbath School, at Cannon's Camp Ground June 24 Anno Domini 1866.
List of the Officers and Teachers.
Officers:(1) James B. Arthur: Superintendent, (2) John Bishop: Assistant Supt., (3) Elijah Cannon: Librarian, and (4) Claudius L. Fike: Secretary.

Teachers:
C. H. Claiborne, N. H. Pettit, Miss Harriet Tillotson, Nahum Cannon, Enoch Cannon, Miss Emeline Cannon, Lewis Webb, Mrs. Jane Love, Mrs. Isabella Webb, Miss Cannon.
*********************************************
Harriet Tillotson married Albert Cleveland Fitzgerald on 17 July 1866, in Spartanburg County, South Carolina. All of their children were born in Spartanburg, South Carolina, and they were:
• Luna [Lunar] (8 Feb 1868 – 23 June 1914)
• Emma Caroline (8 June 1870 – 21 Feb 1955)
• Jessie (10 Feb 1872 – 18 Feb 1933)
• Mattie Jane (17 August 1875 – 5 October 1957)
• James Charles [Charlie] ( 21 May 1878 – 25 Dec 1946)
• Nora Belle (18 Feb 1881 – 22 Sept 1964)
• Matthew Wilson [Witt] (29 April 1885 – 10 March 1969)
• Rufus Pryor (31 March 1888– 27 Oct 1976)
• Clyde Falls (24 August 1894 – 9 May 1966)
*********************************************

Harriet Lucindi Tillotson Fitzgerald died on 6 December 1918 of the Flu in the Great Flu Epidemic of 1918.