On the Jotun:

The Jotun are races of giants, the children of Oceanus. Their roots lie in
the oceans of Wysoom, where they once inhabited the city of Atlantis, ruled
by the Titans. Atlantis is long gone now, sunk beneath the waves, and the
prophetic Boelir forsee only further decline for all their kin.

After Atlantis sank, the Jotun scattered among the worlds. The Boelir went
to Crypt, the Giants to Welstar, and Arcanus and Ettins to Raji. Some also
say that the Ettins aligned themselves with the Unseelie Court to try to
regain their former power.  Vanir are seen from time to time on any of the
worlds, depending on who they may have been born from.

A little of the Jotun birthright still survives. By remaining on Wysoom, 
the Titans and Irrdu were able to retain their immortality, and all Jotun
still have a racial memory of certain powerful runes (HELP RUNEKEY) that
they can invoke to aid themselves.

See also: HELP RACES