Hyperborean

01 a. Of or pertaining to the region beyond the North wind, or to its inhabitants.

1.
Of or pertaining to the region beyond the North wind, or to its inhabitants.(Greek Myth.)
2.
Northern; belonging to, or inhabiting, a region in very far north; most northern; hence, very cold; fright, as, a hyperborean coast or atmosphere.
“The hyperborean or frozen sea.” — C. Butler (1633).

02 n. One of the people who lived beyond the North wind, in a land of perpetual sunshine.

1.
One of the people who lived beyond the North wind, in a land of perpetual sunshine.(Greek Myth.)
2.
An inhabitant of the most northern regions.