Ægir (Old Norse: Ægir) is a being associated with the sea and with feasting, best known as the host of a great feast attended by the Æsir — the feast at which Lokasenna is set. His name is cognate with a Proto-Germanic word for water or sea. Ægir is not clearly categorized as an Æsir, Vanir, or jötunn in the primary sources — he is treated more as a primordial personification of the sea who interacts with the gods than as a full member of the divine community.

Ægir brews ale for the gods in a great cauldron obtained by Thor from the giant Hymir — the episode recounted in Hymiskviða. The feast at Ægir’s hall, lit by shining gold rather than fire, is described in the prose introduction to Lokasenna and referenced in Skáldskaparmál. In Skáldskaparmál, Snorri describes a meeting between the skald Bragi and Ægir in which Ægir asks questions about kennings and poetic technique.

Ægir’s wife is Rán, a sea deity who catches drowning sailors in her net. His nine daughters are personifications of waves, named in Skáldskaparmál and referenced in Helgakviða Hundingsbana I.