Why is this whiskey called bourbon?

A hotly debated topic, but it likely takes its name from Bourbon County, located in the central Bluegrass region of Kentucky. It was formed from Fayette county in 1785 while still a part of Virginia and named to honor the French Royal Family and was once the major transshipment site for distilled spirits heading down the Ohio and Mississippi rivers to New Orleans. Barrels shipped from its ports were stamped with the county's name, and Bourbon and whiskey soon became synonymous.