Oh, you'll love this one. Prior to the late 1960's, when the first US-Canada Free Trade Pact, called the Auto Pact and which applied only to automotive products was enacted, Pontiac made different cars in the US and Canada. The "Canadian Pontiacs" were manufactured in a Chevrolet-Pontiac joint venture, and certain models made for the Canadian market utilized Chevrolet frames and drivetrains with unique body and interior parts that fit those chassis.
Pontiac also used unique model names that were related typically to some aspect of Canadian history or tradition for these models. For example the full size deluxe model was a Parisienne, the base full size was a Laurentian.
My first car was a 2-door Pontiac Acadian, 1964 model, bought used around 1978, which was built on a Chevy Nova chassis and drivetrain and sported a 230 CID straight six motor and "three on the tree".
An "Acadian" is a resident of Atlantic Canada, and also implies a link to United Empire Loyalists ... Americans who moved to Canada during or after the American Revolution, who felt an allegiance to the British Crown versus the new American republic.
But it was not "just" an Acadian, it had a sub-model designation, indicating the premium trim level. I owned a 1964 Pontiac Acadian Invader. "Acadian" appeared in chrome block letters on the trunklid between the rear tail lights, and "Invader" appeared in chrome script on the body on both fenders. No lie.