Canadian is the byname used in some countries for the descendants of the birch bark canoe that was used by the indigenous peoples of Northern America as a convenient means of transportation in the densely forested and impassable areas of Northern America.
In the United Kingdom and several other European countries the kayak is considered to be a kind of canoe.
(Technically this is understandable, as one can easily see when a whitewater kayak is converted into a decked whitewater canoe just by taking the seat out and paddle it kneeling with a single blade paddle.)
At that time those organizations for large part consisted of somewhat elitist [wealthy] people with the opinion that one should be able to sail well with a touring canoe.
In America the canoe lost its qualifying prefix 'Canadian' not long afterwards.