John Fraser (Also spelled Frazer, or Frazier) was a Scottish-born trader living in the area of Fort Duquesne during the French and Indian War, and a participant in the Braddock Expedition. Fraser left Scotland sometime after 1745, possibly because of political troubles (the Frasers had supported the Stuarts, who were on the losing end of a rebellion). He set up trade on the upper Allegheny river, but was quickly run out of his cabin by the French. He moved further down the river - near modern-day Pittsburgh, built a new cabin and continued to trade.