According to Fundinn Noregr, Ægir is a son of the giant Fornjótr, the king of Finland, Kvenland and Gotland, and brother of Logi ("fire") and Kári ("wind").
The first part of Snorri Sturluson's Skáldskaparmál is a dialogue between Ægir and Bragi about the nature of poetry, particularly skaldic poetry.
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If Bragi's mother is Frigg, then Frigg is somewhat dismissive of Bragi in the Lokasenna in stanza 27 when Frigg complains that if she had a son in Ægir's hall as brave as Baldr then Loki would have to fight for his life.
According to the Prose Edda book Skáldskaparmál, Hlér is another name for the sea jötunn Ægir who, according to the same book, there held feasts for the gods.
The Daughters of Ægir are the nine daughters of Ægir and Rán, a giant and goddess who both represent the sea in Norse mythology.