Bourbon () is a type of barrel-aged American whiskey made primarily from corn (maize). The name derives from the French Bourbon dynasty, although the precise source of inspiration is uncertain; contenders include Bourbon County in Kentucky and Bourbon Street in New Orleans, both of which are named after the dynasty. The name bourbon was not applied until the 1850s, and the Kentucky etymology was not advanced until the 1870s. Bourbon has been distilled since the 18th century. Although bourbon may be made anywhere in the United States, it is strongly associated with the American South in general, and with Kentucky in particular. As of 2014, distillers' wholesale market revenue for bourbon sold within the U.S. was about $2.7 billion, and bourbon made up about two thirds of the $1.6 billion of U.S. exports of distilled spirits. According to the Distilled Spirits Council of the United States, in 2018 U.S. distillers derived $3.6 billion in revenue from bourbon and Tennessee whiskey (a closely related spirit produced in the state of Tennessee). Bourbon was recognized in 1964 by the U.S. Congress as a "distinctive product of the United States". Bourbon sold in the U.S. must be produced in the country from at least 51% corn and stored in a new container of charred oak. History Distilling was most likely brought to present-day Kentucky in the late 18th century by Scots, Scots-Irish, and other settlers (including English, Irish, Welsh, German, and French) who began to farm the area in earnest. The origin of bourbon as a distinct form of whiskey is not well documented and there are many conflicting legends and claims. For example, the invention of bourbon is often attributed to Elijah Craig, a Baptist minister and distiller credited with many Kentucky firsts (e.g., fulling mill, paper mill, ropewalk) who is said to have been the first to age the product in charred oak casks, a process that gives bourbon its brownish color and distinctive taste. In Bourbon County, across the county line from Craig's distillery in what was then Fayette County, an early distiller named Jacob Spears is credited with being the first to label his product as Bourbon whiskey. Although still popular and often repeated, the Craig legend is apocryphal. Similarly, the Spears story is a local favorite but is rarely repeated outside the county. There likely was no single "inventor" of bourbon, which developed into its present form in