Part of a legal description of a boundary line of Dixie County, for instance, says it goes "southerly down the thread of the main stream of said Suwannee River to the Gulf of Mexico; thence along said Gulf of Mexico, including the waters of said gulf within the jurisdiction of the State of Florida, to the mouth of the Steinhatchee River."

Mapmakers and teachers are re-thinking what to call the gulf of water between Mexico, the United States and Cuba.

Britain will not refer to the Gulf of Mexico as the Gulf of America despite Donald Trump’s order for it to be renamed, The Telegraph understands. Britain will continue to call the body of water by its current name unless the new title ordered by Mr Trump gains widespread usage in English.