Pure laine

The French term pure laine (lit. 'pure wool' or 'genuine', often translated as 'old stock' or 'dyed-in-the-wool'), refers to Québécois people of full French Canadian ancestry, meaning those descended from the original settlers of New France who arrived during the 17th and 18th centuries. Terms with a similar meaning include de souche (of the base of the tree, or root) and old stock as in "Old Stock Canadians".

Many French-Canadians are able to trace their ancestry back to the original settlers from France— a number are descended from mixed marriages between the French, Scottish and Irish settlers. Unions sharing Roman Catholic faith were approved by the Roman Catholic Church in Quebec. Many English emigrants in the region, especially after 1763 when Quebec was ceded to Britain, were ultimately assimilated into Francophone culture.

The term is associated with nativism and ethnic nationalism in Quebec, and its usage has been criticized for excluding immigrants from Québécois identity and culture.