E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Lokis Three Children
were Jörmungand (a monstrous serpent), Fenrir (a wolf), and Hela (half corpse and half queen). His wife was Siguna.
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Loki is the personification of sin. Fenrir personifies the gnawings of a guilty conscience. Both Loki and Fenrir were chained by the Æshr, but not with iron chains. (Scandinavian mythology.)