In Norse mythology, Otr is a dwarf. He is the son of the king Hreidmar and the brother of Fafnir and Regin.
Ótr on the Ramsund carving in Södermanland, c. 1030
Sigmunds Schwert by Johannes Gehrts
The Salmon of Knowledge is a creature in the Fenian Cycle of Irish mythology, sometimes identified with the mythical seer Fintan mac Bóchra who was known as "The Wise" and was once transformed into a
Scales on the Big Fish or Salmon of Knowledge sculpture, which celebrates the return of fish to the River Lagan