Dol Amroth was a rocky promontory on the western coast of Belfalas named after the Sinda lord Amroth son of Amdír, who founded Tirith Aear upon its cliffs during the mid-Second Age. Later, after Belfalas was was given as a fief to Edhelion of Dor-en-Ernil and his descendants, the name was extended to refer to the entire Númenórean settlement of the promontory, both Ost-en-Ernil and Lond Ernil, the haven-town that grew up around it. When reference was made only to the town and not the castle. "Lond Ernil" was used instead.