In Norse legends, the hero Siegfried, known as Sigurd in the sagas, has a strong connection with the Rhinegold. His story is intertwined with the treasure of the Rhine River, which originally belonged to the dwarf Fafnir. After slaying Fafnir, Sigurd gains the power of the gold, leading to themes of greed, power, and ultimately tragedy, as it curses those who possess it.