In
Norse mythology,
Hreidmar was the father of
Otter,
Fafnir and
Regin. Otter was accidentally killed by the
Aesir, who repayed him with
Andvari's cursed
gold. Fafnir and Regin then killed Hreidmar for the gold, though Fafnir then decided he wanted to the gold all for himself; he turned into a
dragon.