Hel or Hela (Scand.). The Goddess-Queen of the Land of the Dead; the inscrutable and direful Being who reigns over the depths of Helheim and Nifelheim. In the earlier mythology, Hel was the earth-goddess, the good and beneficent mother, nourisher of the weary and the hungry. But in the later Skalds she became the female Pluto, the dark Queen of the Kingdom of Shades, she who brought death into this world, and sorrow afterwards.
Source: H.P.Blavatsky - The Theosophical Glossary