Actually they were originally called 'Westport chairs' named after Wesport, New York where it was patented. It was only later called the Adirondack chair in honor of the mountains, where there was a convalescent home/retreat where T.B patients went to recover, after that they were called Adirondack chairs due to the popularity and comfort. There is some slight differences between the two though, the American version has a flat yolk, where the Canadian has a curved, the span between the arms is smaller in the Canadian version, as well they are lower to the ground. The things you learn having cabinet and furniture maker friends. I actually grew up with hearing them called "West Ports", but anytime I've called them that no one ever knew what I was talking about or figured I was referring to cigarettes. So Muskoka/Adirondack it is. Regardless, Muskoka, Laurentian or Adirondack chair, it's all pretty much the same anyway, only localized. Since my spinal surgeries though, I find them very uncomfortable and avoid them like the plague.