JUCHERAU, Nicholas (zhoo'-she'-ro'), Sieur de St. Denis, French soldier, born in Ferte Vidame, France, in 1626; died in Baupre, Canada, in 1692. He came with his father, John Jucherau, to Canada, about 1640, and was afterward appointed member of the superior council of Quebec. With the view of protecting the colonists from the incursions of the Iroquois, he formed his tenantry into a body of militia, and at their head followed De Courcelles in his expedition against the Agniers in 1665. His conduct on this occasion was so admirable that he was made perpetual commander of this force. He commanded the militia at the battles at Beaufort against the English under Sir William Phipps on 18, 20, and 21 October, 1690, and was severely wounded. The victory was considered due to Jucherau's bravery. He was ennobled by Louis XIV. for his conduct on this occasion.-His son, Louis (called by some writers BARBE), Sieur de St. Denis, soldier, born in Quebec, Canada, 18 September, 1676; died probably in Louisiana after 1731, acquired renown in Louisiana as a skilful negotiator and able soldier. His influence with the indians and knowledge of their language induced Iberville (q. v.) to place him in command of the French fort at the mouth of the Mississippi in 1700. La Metre Cadillac sent him oil a mission to the viceroy of Mexico, in 1714, to make a treaty of commerce. After travelling through a great extent of country and meeting several Spanish governors and officers, by whom he was well received, he reached the city of Mexico, 25 June, 1715. He was at first imprisoned by the viceroy, but, on the latter's learning that he was a relative of Iberville, he was set at liberty and treated with courtesy. He afterward went on a mission to the Assinais Indians of Texas, who were in revolt, persuaded them to submit to the Spaniards, and returned to Mexico accompanied by twenty-five of their chiefs. He was not successful, however, in achieving the object of his embassy, returning to Mobile, 25 August, 1716. During the attack of the Spaniards on the French possessions on the Gulf of Mexico in 1719, he assembled the Biloxi and other Indian tribes, and, at their head, contributed to the repulse of the Spaniards from Dauphin island. He was rewarded with the cross of St. Louis and made governor of Fort Natchitoches in 1720. The fort was besieged in 1731 by the Natchez. He had only a few soldiers, but, having received a re-enforcement of Assinais, he attacked the enemy and defeated them, destroying nearly all their leaders.