Thomas was born about 1690 in England; some say in Wales. This is largely based on a presumed marriage date of about 1715. He would have been about 25 years old. Some researchers put his birth at 1675, but this would have made him age 40 at his marriage. And since it seems he came to Virginia a young man not too long before his marriage, 1675 seems too early. It would also mean he was over 100 years old when he died; very unlikely.
Thomas married Sarah Witt about 1715 probably in Charles City County, Virginia Colony. This is based on birth of children.
Children
Mary Harbour married Palatia SHELTON[1]
David Harbour b. ca 1718, Goodland County, Virginia
Lavinia Harbour b. ca 1720, Virginia d. Halifax County age 61; possibly m. her cousin Charles Witt ca 1744.
Talmon Harbour, b before 1728 at Deep Creek, Henrico County. m. 1747 Mary Wright, a charter member of the Dan River Baptist Church d. age 95 in Patrick County, Virginia.
Abner Harbour b. ca 1730 Goodland County Virginia d. 1778 age 48 years. buried Henry County Virginia. m. Joyce Thornhill ca 1750 & lived near Irwin's River on Sycamore Creek in what is now Patrick Country. Abner's ridge is near his old farm and part of the Blue Ridge mountains. Upon his death he left his land to his 4 sons which are unnamed. His widow Joyce remained in Virginia.
Mary Harbour b. about 1733 In 1770 Mary relinquished her right of dower. 18 Sept 1766 144 acres of land were sold or given to Palatiah Shelton, believed to be her husband. Several other pieces of the Harbout land were sold & traded to Palatiah Shelton and again Mary Harbour relinquished her dower.
Elisha Harbour b. about 1735 in Goodland County, Virginia d. after May 1773. 17 August 1763 Elisha was given a 150 tract on Irwins's river by his father, he was on Edward Booker's tax list of 1765. On 17 July 1767 Elisha paid 1 tithe for 150 acres on the land his father had given him. After selling this land 22 May 1773 he bought 243 acres from John Witt. he married a woman named Margaret ca 1760. The last record for Elisha is dated 22 May 1773 when he bought 243 acres from John Witt on Marrowbone Creek.
Elijah Harbour b. about 1735 in Virginia. d. 1769 Pittsylvania County Virginia at 34 years m. Prudence Pusey about 1758 they lived on the 318 acre Goblintown Creek tract his father deeded to him in October 1761 for 10 schillings. He was listed there on the tax list recorded by Peter Copeland 17 July 1767. The appraisal of his estate included stock of hogs, sundry cattle, 3 horses, a parcel of books, totaling 57 pounds.
Jane Harbour b. abt 1737 Half of her sister's belongings were deeded to her upon Sarah's death. She was the possibly wife of Elijah Witt
Adonijah Harbour b. August 1740 in Virginia d. 1815 age 72 in Louisiana m.1. Anne Dalton 25 Aug 1769 in Pittsylvania County. Daughter of Samuel Dalton & Ann Dandridge Redd who were neighbors. m. @. Charlotte Gallihue Dalton 1791. The daughter of William Gallihue and Anne Kenner, the widow of Samuel Dalton II
Sarah Harbour b. abt 1741 d. after 1779 m. David Witt d. abt 1778, was the son of William Witt, making him a cousin. They lived in what became Patrick County. William received a land grant of 200 acres. Sarah & David had 2 sons, John & William Witt who were deeded the 140 Blackberry Creek tract by their grandfather Thomas Harbour.
https://www.wikitree.com/wiki/Harbour-3