Jul 28, 2021 · Country name. conventional long form: Republic of Trinidad and Tobago conventional short form: Trinidad and Tobago etymology: explorer Christopher COLUMBUS named the larger island "La Isla de la Trinidad" (The Island of the Trinity) on 31 July 1498 on his third voyage; the tobacco grown and smoked by the natives of the smaller island or its elongated cigar shape may account for the "tobago ...