J.K. Rowling just revealed what wizard money is called in America

In the "Harry Potter" series, J.K. Rowling carefully explains how the wizarding currency systems works, but in America, wizards aren't using gold galleons, silver sickles, and bronze knuts to buy their wands and pumpkin juice.

Instead, wizards in America spend dragots, Rowling revealed on Thursday in a new story on her fan site, Pottermore. The story, "Rapaport's Law," is the third of four installments in the "Magic in North America" series, which Rowling is using to tease her upcoming movie, "Fantastic Beasts and Where to Find Them."

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The US government has a secretary of the Treasury. In the wizarding world, the Magical Congress of the United States of America also has an official designated to overseeing finances, the Keeper of Treasure and Dragots. In 1790, the position was held by Aristotle Twelvetrees, a man whose daughter almost brought an end to the entire wizarding world in America.

No word from Rowling on whether Twelvetrees also had a penchant for dueling like his No-Maj — American for "muggle" — counterpart of the day, US Secretary of the Treasury Alexander Hamilton. Hamilton died in a duel — with guns, not wands — in 1804.  

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