Prior to being named after the Marquis of Mancera the island was known as Güiguacabin (from ühueñn, "whistle", or ühua, "maize", and cahuin, "party") to the indigenous Mapuches. In his 1544 expedition Juan Bautista Pastene, made the island known for the Spanish and named it Imperial.
Prior to being named after the Marquis of Mancera, the island was referred to as Güiguacabin (derived from ühueñn, "whistle", or ühua, "maize", and cahuin, "party") by the indigenous Mapuches. In his 1544 expedition, Juan Bautista Pastene introduced the island to the Spanish and gave it the name Imperial.