Thayendanegea or Joseph Brant (March 1743 – November 24, 1807) was a Mohawk military and political leader, based in present-day New York and, later, Brantford, in what is today Ontario, who was closely associated with Great Britain during and after the American Revolution. Perhaps the best known Native American of his generation, he met many of the most significant American and British people of the age, including both United States President George Washington and King George III of Great Britain.
While not born into a hereditary leadership role within the Iroquois Confederacy, Brant rose to prominence due to his education, abilities, and connections to British officials. His sister, Molly Brant, was the wife of Sir William Johnson, the influential British Superintendent of Indian Affairs in the Province of New York. During the American Revolutionary War, Brant led Mohawk and colonial Loyalists known as Brant's Volunteers against the rebels in a bitter partisan war on the New York frontier. He was falsely accused by the Americans of committing atrocities and given the name "Monster Brant."
In 1784, Quebec Governor Frederick Haldimand, issued a proclamation that granted Brant and his followers land to replace what they had lost in New York during the Revolution. This tract was about 810,000 hectares (2,000,000 acres) in size, 12 miles (19.2 kilometers) wide along the whole length of the Ouse or Grand River in what is now southwestern Ontario. Brant relocated with many of the Iroquois to the area where the Six Nations Reserve is now located, and remained a prominent leader until his death.
Source : Wikipedia