Kondiaronk (c. 1625–1701) (Gaspar Soiaga, Souojas, Sastaretsi), known as Le Rat (The Rat), was chief of the Native American Wendat (Huron) people at Michilimackinac in New France, where they settled after war with the Iroquois in 1649, This is the area around the strait connecting Lakes Huron and Michigan and separating Michigan's Upper and Lower Peninsulas in the present-day United States.

Noted as a brilliant orator and a formidable strategist, Kondiaronk led the pro-French Petun and Huron of Michilimackinac against their traditional Iroquois enemies. In the chaotic and violent strategic environment of the Beaver Wars, he aimed to prolong the fighting between the Wendat's main rivals, the Iroquois and the French. Kondiaronk succeeded in this aim; however, once he had secured the position of the Wendat, he favored a general peace settlement and managed to persuade all sides.

This effort concluded in the 1701 Great Peace of Montreal between France, the Iroquois, and the other Indian tribes of the Upper Great Lakes. This ended the Beaver Wars and helped open up the interior of North America to deeper French exploration and commerce.

The Jesuit historian Father Pierre François Xavier de Charlevoix wrote that "it was the general opinion that no Indian had ever possessed greater merit, a finer mind, more valor, prudence or discernment in understanding those with whom he had to deal". Louis-Hector de Callière, the Onontio (governor) that replaced Frontenac, was "exclusively indebted to him for ... this assemblage, till then unexampled of so many nations for a general peace".

Kondiaronk contracted a fever and died in Montreal during the negotiations for the Great Peace on August 2, 1701. His body was buried at Montreal's Notre-Dame Church after a majestic funeral. Today, no trace of the grave remains. The Kondiaronk Belvedere in Montreal's Mount Royal Park is named in his honor. In 2001, he was named a Person of National Historic Significance by the Canadian government.

Kondiaronk's first major role came in 1682, representing the Mackinac Huron tribe in negotiations between the French governor Frontenac and the Ottawa tribe which shared Michilimackinac village. Kondiaronk looked towards the French for protection from the Iroquois tribes after an Iroquois chief, a Seneca, was murdered while being held prisoner in the Michilimackinac village. Afterwards, the Huron sent wampum belts to the Iroquois to appease the murder; however, the diplomatic representative of the Ottawa told Frontenac that the Huron did not send any of the Ottawa's wampum belts. Furthermore, the Ottawa insisted that the Huron placed all the blame for the murder on them. Kondiaronk maintained his position that the actions of the Huron were only to placate the Iroquois, but the Ottawa were not convinced and French efforts to conciliate the two tribes had little effect. Despite the tensions between the Huron and Ottawa, Kondiaronk's appeal to the French did secure an alliance to stave off Iroquois military advances.

By 1687, the French Governor General, Denonville, had taken over the land of the Senecas. Kondiaronk and the Hurons agreed to ally with the French as long as Denonville promised that war against the Iroquois would not stop until the Iroquois were fully defeated.

In 1688, Kondiaronk formed a war party and traveled to Fort Frontenac on the way to raid Iroquois villages. While at the fort, Kondiaronk learned that Denonville had begun discussing peace with the Iroquois, despite his prior agreement with the Hurons that war would continue. The war party withdrew back across Lake Ontario and waited for the Iroquois Onondaga delegation to pass through on their way to Montreal.