Dwarves

Then said Þriði: They took also his skull and made thereof heaven and set it up over the earth with four sides, and under each corner they set dwarves: they hight thus Austri, Vestri, Norþri, Suþri.

The belief in Dwarves as inhabitants of the interior of the earth and especially of large isolated rocks, was likewise a direct offshoot of the Asa-Mythology.

When the human magi arrived, Dunner was the dwarf responsible for arbitrating between them and the dwarves as to location and the hundreds of other minor quibbles that seemed likely to turn into major battles, owing to simple misunderstandings of each other's ways.