or Eagor, was a Germanic sea god, the husband of Ran and father of nine daughters, the waves. He seems to have belonged to an older generation of the gods than either the Aesir or the Vanir, although no details of his descent survive. Aegir was sometimes depicted as a very old man with white hair and claw-like fingers. Whenever he rose from his under-water hall, he broke the surface of the sea for a single purpose, the destruction of ships and their crews. To ensure a calm voyage, prisoners would usually be sacrificed to Aegir before a Viking raiding party set sail for home.
One myth tells how the proud sea god was outwitted by Thor. Aegir had been ordered by Thor to brew some ale for the gods, but he pretended that he had no cauldron large enough for the task. In fact he disliked being told what to do. But undaunted, Thor acquired a vast cauldron from the frost giant Hymir. It was so big that when he hoisted in onto his shoulders, the handles reached his ankles. Hymir tried to stop Thor leaving with the cauldron, but the god's hammer saw off Hymir and his gigantic friends. As a result, a humiliated Aegir had to accept the cauldron and supply Asgard, the home of the gods, with ale.
It was at a subsequent feast for the gods held by Aegir that Loki showed how evil he had become when he insulted the assembled company and stabbed Aegir's servant Fimafeng.