Myths of the Norsemen: From the Eddas and Sagas

The gods not only appointed Sun, Moon, Day, and Night to mark the procession of the year, but also called Evening, Midnight, Morning, Forenoon, Noon, and Afternoon to share their duties, making Summer and Winter the rulers of the seasons. Summer, a direct descendant of Svasud (the mild and lovely), inherited his sire’s gentle disposition, and was loved by all except Winter, his deadly enemy, the son of Vindsual, himself a son of the disagreeable god Vasud, the personification of the icy wind.

The cold winds continually swept down from the north, chilling all the earth, and the Northmen imagined that these were set in motion by the great giant Hræ-svelgr (the corpse-swallower), who, clad in eagle plumes, sat at the extreme northern verge of the heavens, and that when he raised his arms or wings the cold blasts darted forth and swept ruthlessly over the face of the earth, blighting all things with their icy breath.