"Takakkaw", loosely translated from Cree, means something like "it is magnificent". The falls are fed by the Daly Glacier, which is part of the Waputik Icefield. The glacier keeps the volume of the falls up during the warm summer months, and they are a tourist attraction, particularly in late spring after the heavy snow melts, when the falls are at peak condition.
You can see the Daly Glacier above the falls in this photo.
A shout out to Everybody Has To Be Somewhere, who has a nice post on this wonderful place.