Both Hversu Noregr byggðist and Snorri Sturluson in Skáldskaparmál state that Ægir is the same as the sea-giant Hlér, who lives on the Hlésey ("Hlér island", modern Danish Læsø), and this is borne out by kennings [REF].
The prose introduction to Lokasenna and Snorri's list of kennings state that Ægir is also known as Gymir, who is Gerðr's father, but this is evidently an erroneous interpretation of kennings in which different giant-names are used interchangeably [REF].