Madoc ab Owain Gwynedd (also spelled Madog) was, according to folklore, a Welsh prince who sailed to the Americas in 1170, over three hundred years before Christopher Columbus's voyage in 1492.
According to the story, he was a son of Owain Gwynedd, and took to the sea to flee internecine violence at home. The "Madoc story" legend evidently evolved out of a medieval tradition about a Welsh hero's sea voyage, to which only allusions survive. However, it attained its greatest prominence during the Elizabethan era, when English and Welsh writers wrote of the claim that Madoc had come to the Americas as an assertion of prior discovery, and hence legal possession, of North America by the Kingdom of England.[1][2]
The Madoc story remained popular in later centuries, and a later development asserted that Madoc's voyagers had intermarried with local Native Americans, and that their Welsh-speaking descendants still live somewhere in the United States. These "Welsh Indians" were credited with the construction of a number of landmarks throughout the Midwestern United States, and a number of white travelers were inspired to go looking for them. The Madoc story has been the subject of much fantasy in the context of possible pre-Columbian trans-oceanic contact. No archaeological, linguistic, or other evidence of such a man or his voyages has been found in the New or Old World; however, legends connect him with certain sites, such as Devil's Backbone, located on the Ohio River at Fourteen Mile Creek near Louisville, Kentucky.[3]