Guanahani
The Taíno name of the first island where Columbus landed in October 1492; which Bahamian island it was is still debated.
Today: probably San Salvador Island, Bahamas
News of the First Voyage
Christopher Columbus, letter to Luis de Santángel, February 1493 (opening) · dated February 15, 1493 (events of October 1492 onward)
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A la primera que yo fallé puse nombre San Salvador, á conmemoracion de su Alta Magestad, el cual maravillosamente todo esto ha dado: los indios la llaman Guanahani.
The first island I found I named San Salvador [Holy Savior], in honor of His Divine Majesty, who has so wonderfully given all this. The Indians call it Guanahani.