Do you have this information? I have not confirmed this myself, but it may help you. My Husband comes from the line of Sara and John Cannon.
Sarah HAMMETT3 (William2, William1), born bef 1731; died aft 1787, but bef 1824, in South Carolina; married (1) 19 Dec 1744, Overwharton Parish, Stafford Co, VA, Christopher BRODERICK, who died while she was carrying their first child, Mary, whereupon Sarah married (2) 8 Jul 1745, three months' prior to her daughter's posthumous birth, also in Overwharton Parish, John CANNON, who died bef 1788, Spartanburg Co, South Carolina. The records of Overwharton Parish, Stafford County, Virginia, include the following:
Married: HAMMET, Sarah and Christopher BRODERICK; December 19, 1744
Married: BRODERICK, Sarah and John CANNON, Jul 8, 1745
Born: BRODERICK, Mary daughter of Christopher and Sarah BRODERICK, October 20, 1745
Born: CANNON, Ellis, son of John and Sarah CANNON, January 3, 1748
Born: CANNON, John, son of John CANNON, February 1, 1750
Born: CANNON, Henry, son of John and Sarah CANNON, April 10, 1752
Born: CANNON, William, son of John and Sarah CANNON, July 4, 1754
Born: CANNON, Sarah, daughter of John CANNON, June 9, 1757
(The Register of Overwharton Parish, Stafford Co, VA, 1723-1758 and Sundry Historical and Genealogical Notes, George Harrison Sanford King, Southern Historical Press, Easley, SC, 1961, hereinafter OPR)
Note that Christopher BRODERICK, first husband of Sarah HAMMETT, has remained a mystery to researchers, in good part due to the 'holes' in Stafford County, Virginia's records; however, the 1745 Stafford County estate account entered by his father-in-law, William HAMMETT II, and including a mention of Orange County, Virginia, may provide additional clues to his ancestry (See William HAMMETT II, 1745, Stafford VA).
Sarah HAMMETT Broderick Cannon is documented as daughter of William HAMMETT II, and wife of John CANNON, by a deed of gift dated 6 May 1765 and recorded ten days later of 102-1/2 acres in Culpeper County, Virginia, from William HAMMETT of Culpeper "to Sarah CANNON, my daughter and wife of John CANNON.
In Nova Scotia Letter No. 1, John HAMMETT, Sr., brother of Sarah HAMMETT (Broderick) Cannon, writes from Spartanburg District, South Carolina, on Feb. 9, 1822, to his son, George in Nova Scotia:
"…the next spring which was in 1785 I received a letter [in Burke Co, Georgia] that Thomas UNDERWOOD, George UNDERWOOD, John CANNON, William HAMMETT, Charles and Daniel HAMMETT and all their families had moved out from Virginia and were settled on Pacolet [River] and Fairforest [Creek], near where I had lived…" (NSL1, Hammett Families… ) [nb: It is believed this letter, which was an old transcription, not a copy of the original, was mistranscribed, and that it should have read, William, our brother, not your brother]
John CANNON died ca 1787 in Spartansburg Co, SC, at which time Sarah was still living. (Spartanburg WD 1787). Sarah was deceased by 24 Jun 1824 when George HAMMETT, son of John and Sarah UNDERWOOD Hammett, wrote his brother, James Ferguson HAMMETT, that "Aunt Sarah married twice. I don't recollect her first [Christopher BRODERICK], the last John CANNON who moved to this country and are both dead. She had one daughter [Mary BRODERICK] by her first who is Francis MASON'S mother who married [our] Sister Ellender [HAMMETT]. The CANNONS are chiefly on Pacolet." (NSL4, Hammett Families…) Note: Francis MASON'S mother was Mary BRODERICK who married James MASON to whom William HAMMETT II deeded land in 1772.
The Revolutionary War Pension Records of Sarah HAMMETT (Broderick) Cannon's son, Henry, born 10 Apr 1752, Overwharton Parish, Stafford, includes the declaration, made 29 Sep 1832 in Greenville District, South Carolina that he was born 11 Apr 1751 or 52 in Stafford Co, VA & that he had lived in Culpeper Co, Virginia when he enlisted and that in 1784, he had moved to Spartanburg District, South Carolina, and later to Greenville District, South Carolina, where he stated he had lived 22 years. His brother, Elam CANNON, was mentioned, as was 'a clergyman,' Ellis CANNON (relationship not stated). (RW Pension File S8187, White, p. 533)