Sköll

Sköll is a giant wolf from Norse mythology. His name means “repulsion” and he chases the sun trying to devour it. He is a son of Fenrir and is paired with his brother Hati. The giantess Iarnsaxa feeds him the marrow from adulterers and murderers. Eclipses are caused  when he or his brother nearly succeed, and people would make loud noise to scare them off. It is thought that at Ragnarok both will succeed and devour the celestial bodies, setting off three years of winter.

Citations:

Dougherty, Martin J.. Norse Myths: Viking Legends of Heroes and Gods. United Kingdom, Amber Books Ltd, 2016.

Guerber, Hélène Adeline. Myths of the Norsemen: From the Eddas and Sagas. United Kingdom, G. G. Harrap, 1912.

Lindow, John. Norse Mythology: A Guide to Gods, Heroes, Rituals, and Beliefs. United Kingdom, Oxford University Press, USA, 2002.