Viktor Rydberg 
Teutonic Mythology [EPUB ebook] 

Idun was the beautiful goddess who in Asgard was keeper
of the apples which the gods ate to preserve eternal youth.
She is most generally regarded as the wife of Brage.
Heimdal, the son of nine mothers, was guardian against the
giants of the bridge of the gods, Bifröst. With a trumpet he
summoned all the gods together at Ragnarok when he and Loke
slew each other. He was the god of light.
Loke though beautiful in form was like Lucifer in character
and was hence called the god of destruction. By the giantess
Angerboda he had three offspring, the Midgard serpent,
the Fenris-wolf, and Hela, the latter becoming goddess of Hel.