Laurentian
Native to	Canada
Region	Saint Lawrence River Valley
Ethnicity	St. Lawrence Iroquoians
Extinct	late 16th century
Language family	Iroquoian Northern? Laurentian
Language codes
ISO 639-3	lre
Linguist List	lre
Glottolog	laur1250
Territory occupied by the St. Lawrence Iroquois, circa 1535

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Laurentian, or St. Lawrence Iroquoian, was an Iroquoian language spoken until the late 16th century along the shores of the Saint Lawrence River in present-day Quebec and Ontario, Canada. It is believed to have disappeared with the extinction of the St. Lawrence Iroquoians, likely as a result of warfare by the more powerful Mohawk from the Haudenosaunee or Iroquois Confederacy to the south, in present-day New York state of the United States.

The explorer Jacques Cartier observed in 1535 and 1536 about a dozen villages in the valley between Stadacona and Hochelega, the sites of the modern cities of Quebec City and Montreal.^[1] Archeologists have unearthed other villages farther west, near the eastern end of Lake Ontario. St. Lawrence Iroquoians lived in villages which were usually located a few kilometres (miles) inland from the Saint-Lawrence River, and were often enclosed by a wooden palisade. Up to 2000 persons lived in the larger villages.

By the time the explorer Samuel de Champlain arrived in 1608, however, he found no trace of the Iroquoians visited by Jacques Cartier some 75 years earlier.^[2] Scholars have developed several theories to explain the complete disappearance of the St. Lawrence Iroquoians, among them devastating wars waged by the Mohawk from the south, epidemics of Old World infectious diseases, or migration towards the Great Lakes region. Archeological evidence points most strongly to devastating wars with neighbouring Iroquoian tribes, the Huron and the nations of the Iroquois League, especially the Mohawk.^[3]

Several dialects of Laurentian may have existed in the 16th century in the St. Lawrence River valley. The sparse records made by Jacques Cartier during his voyages cannot be considered conclusive, and the Laurentians may have spoken several distinct languages.^[4] A few Laurentian words are still in use today as toponyms: most notably the word canada, meaning "village" in Laurentian. Jacques Cartier used the word to describe both the region and the river that crosses it. The name of Donnacona, the Iroquoian chieftain Cartier met at Stadacona, remains in use as the name of the town of Donnacona, Quebec. Hochelaga remains in use in the Montreal borough of Hochelaga-Maisonneuve and the alternate spelling "Osheaga" serves as the name of Montreal's annual Osheaga Festival.

On the basis of the Laurentian vocabularies of Cartier, the linguist Marianne Mithun concludes that Laurentian was an Iroquoian language, and its speakers were "clearly in contact with the Lake Iroquoian peoples [Huron and Iroquois]" (Mithun, 1981). Charles Julian analyzed the available lexicon and compared it with those of Iroquoian languages still spoken (to some degree) in the 21st century and found that it shared the highest number of cognates with Huron, Mohawk, and Onondaga, with 47 cognates found for all three. Many sound changes are found in common with Huron such as the reduction of consonant clusters containing /j/, however Laurentian also shares features with other Northern Iroquoian languages that Huron lacks. For example Laurentian shows the existence of an epenthetic vowel like found in Susquehannock, Old Mohawk and, Old Onondaga but not in Huron. Because of this he concludes that Laurentian forms its own subgroup within Northern Iroquoian.^[5]

In 1545 Jacques Cartier published a journal of his voyages, including the first list of Laurentian words. Here are some examples (numbers and parts of the human body), as written by Cartier:

A second shorter vocabulary list was appended to his journal of his first voyage, which was published much later, first in Italian and later in English and French.

• List of Web sites on the Laurentian language (Native Languages of the Americas Online Resources)
• Laurentian words