Loki's Three Children
were Jörmungand (a monstrous serpent), Fenrir (a wolf), and Hela (half corpse and half queen). His wife was Siguna.
Loki is the personification of sin. Finrir personifies the gnawings of a guilty conscience. Both Loki and Fenrir were chained by the &AEsir;, but not with iron chains. (Scandinavian mythology.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894