On his third voyage, Columbus sailed south along the east coast of Africa and was caught in the doldrums, a notorious condition of no winds and intense heat. After drifting aimlessly for eight days, the winds returned, but now they were running low on water. Columbus promised to name the first new land he discovered in honor of the Trinity. Sighting an island off the coast of Venezuela this day, July 31, 1498, which coincidentally had three peaks, he gave it the name Trinidad. There they obtained fresh water and in the process were the first Europeans to see South America.
I agree that Columbus was a Roman Catholic and Trinitarian.
He is not included in any list of United States' Founders.