Original: The common name comes from a Portuguese war ship type of the 15th and 16th century , the man-of-war ( named caravela-portuguesa in Portuguese , caravel ) , which had triangular sails similar in outline to the bladder of the Portuguese Man O ' War .
Simplified: The common name comes from a Portuguese war ship type of the 15th and 16th century , the man-of-war ( named caravela-portuguesa in Portuguese , caravel ) .