From Monkey Island wiki
Dante Dragotta is a sword trainer known best for teaching Morgan LeFlay the art of swordfighting.
Morgan displays exceptional swordfighting skills, probably the work of Dragotta's tutelage. Although Morgan, one of Guybrush Threepwood's biggest fans, knows some of his traditional swordfighting insults, she has learned (probably from Dragotta) how to win sword battles without having to depend on her wit.
Moran also has Dante Dragotta's name engraved on the side of her sword's blade.