The name Philippines was derived from King Philip II of Spain in the 16th century. Spanish explorer Ruy López de Villalobos used the name Las Islas Filipinas, in honor of the Prince of Asturias (Spain) during his expedition to the islands, originally referring to the islands of Leyte and Samar. Despite the presence of other names, the name Filipinas was chosen as the name of the archipelago.
The official name of the Philippines changed throughout the course of its history. During the Philippine Revolution, it was officially called República Filipina or the Philippine Republic. From the period of the Spanish-American War and the Philippine-American War, until the Commonwealth period, American colonial authorities referred to the country as the Philippine Islands, a translation of the original Spanish name. It was during the American period that the name Philippines began to appear, a name that has become its common name. The official name of the country is now Republic of the Philippines.