Lydia was a US merchant ship that sailed on maritime fur trading ventures in the early 1800s. In December 1813 it was sold to the Russian–American Company and renamed Il'mena, also spelled Ilmena and Il'men' (Russian: Ильмена). As both Lydia and Il'mena it was involved in notable events. Today it is best known for its role in an 1814 massacre of the Nicoleño natives of San Nicolas Island, which ultimately resulted in one Nicoleño woman, known as Juana Maria, living alone on the island for many years. These events became the basis for Scott O'Dell's 1960 children's novel Island of the Blue Dolphins and the 1964 film adaptation Island of the Blue Dolphins.