Captain William Harden (1747 – July 21, 1821) was an American Revolutionary War soldier, farmer, rancher, marksman, hunter, Native American killer, namesake and founder of Hardinsburg, Kentucky, and the premiere pioneer of Breckinridge County, Kentucky. William Harden, aka "Big Bill" (because of his large stature), and "Indian Bill" (because of his many Native American kills), had black hair, a reddish beard, and he stood 6'4", and weighed 240 pounds. William Harden could run all day, and he did so, along with Simon Kenton, Daniel Boone, and Benjamin Logan, fighting against Native Americans many times together.
William Harden is the brother of the Colonel John Hardin for whom Hardin County, Kentucky was named.
Three French Huguenot brothers, to escape religious persecution in France, fled to Canada after the St. Bartholomew's Day massacre. One of those brothers was William Hardin's great-grandfather, Martin Hardwyn, who was married to Madeleine du Sauchoy of France.
The extreme cold of the Canadian climate caused the three Huguenot brothers to emigrate to the English colony of Virginia. Two of the brothers settled there permanently, and the other emigrated to South Carolina. The Kentucky Hardins—John, Martin, and William—descended from the Huguenot brothers who settled in Virginia.
Martin Hardwyn and Madeleine du Sauchoy had a son named Mark, who was William Hardin's grandfather. Mark was baptized on March 26, 1681 in Staten Island, New York. Mark married Mary Hogue before March 1755 in Fauquier County, Virginia. Major John Hardin (1710-1789) was their son.
William Hardin is either the son of Martin Hardin or Major John Hardin (1710-1789).
Major John Hardin (1710-1789) of Virginia, Pennsylvania, and Kentucky married Catherine Marr Hardin (1711-1786). Major John Hardin was born in 1710 in Northumberland County Virginia, and he was murdered on October 13, 1789 by natives or renegade whites a short distance from Hardin's Fort on what is now the Old Brandenburg Road. Catherine Marr was born in Virginia in 1711, and died in Augusta District in Virginia in 1780. John Hardin may have been William's uncle, if not his father.