The Silmarillion » Elves » Teleri

Eärwen - "Sea Maiden", swan-maiden of Alqualondë, sister to Thingol and daughter of Olwë, lord of the Teleri. Married Finarfin of the Noldor and mother to Finrod, Orodreth, Angrod, Aegnor, and Galadriel. Her children had Teleri blood and were threfore admitted into Doriath. She stayed in the Undying Lands with Finarfin.