Madoc?

The Madoc legend was taken up by a local chapter of the group Daughters of the American Revolution, who are said to have paid for the plaque to be erected at Fort Morgan, Mobile Bay, in 1953.
The plaque read: "In memory of Prince Madoc, a Welsh explorer, who landed on the shores of Mobile Bay in 1170 and left behind, with the Indians, the Welsh language".
And I always thought Saint Brendan of Ireland has been there before Columbus?
