If their sister Thibinoriel had accompanied them on this journey, Eregiel and Calentauriel may have heard her share this background information about their destination:
Amroth, a Grey Elf living in the Sylvan realm of Laurelindórenan east of the Hithaeglir, was a prince. He became king after his father Amdír was slain during the fateful Battle of Dagorlad at the end of the Second Age.
~Prince Amroth~