M Y T H S   O F   T H E   N O R S E M E N (orig. published in 1909)

Uller, the winter-god, was the son of Sif, and the stepson of Sif’s husband, Thor. His father, who is never mentioned in the Northern sagas, must have been one of the dreaded frost giants, for Uller loved the cold and delighted in traveling over the country on his broad snowshoes or glittering skates. This god also delighted in the chase, and pursued his game through the Northern forests, caring but little for ice and snow, against which he was well protected by the thick furs in which he was always clad.

mysterious father a.k.a Loki