Over the next several decades, other Spanish expeditions were dispatched to the islands. In 1543, Ruy López de Villalobos led an expedition to the islands and Leyte and Samar "Las Islas Filipinas" in honor of Philip of Austria, the Prince of Asturias at the time. Philip became Philip II of Spain on January 16, 1556, when his father, Charles I of Spain (who also reigned as Charles V, Holy Roman Emperor), abdicated the Spanish throne. The name was then extended to the entire archipelago later on in the Spanish era.