Dark Alfs en · PROPN
Etymology
A calque of Old Norse dǫkkalfar.
Meanings
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(Norse) The Dǫkkálfar.
But the Döckalfar (Dark Alfs) dwell below under the ground, and are unlike them in appearance, and still more unlike in actions.
1828, Thomas Keightley, The Fairy Mythology, volume I, London: William Harrison Ainsworth, page 109: