Jacques Cartier was a French explorer of Breton origin who claimed what is now Canada for France. Jacques Cartier was the first European to describe and map the Gulf of Saint Lawrence and the shores of the Saint Lawrence River, which he named "The Country of Canadas", after the Iroquois names for the two big settlements he saw at Stadacona and at Hochelaga.

https://en.wikipedia.org/wiki/Jacques_Cartier