These spelling variants testify to a pronunciation often heard in the North.
1899  . . . three figures in parkees looking like hooded night-shirts began in earnest their journey.
1940  This word is usually spelled parka, but I am spelling it the way it is always pronounced. The parky is a loose-fitting garment which is slipped over the head and comes down to about the knees.
1947  Their parkis cane down to a V fore and aft. . . . [Yukon Indians].