to get fresh food as the inhabitants, Chamorros, "entered the ships and stole whatever they could lay their hands on", including "the small boat that was fastened to the poop of the flagship." The Spanish crew, in retaliation, attacked the Chamorros and dubbed the islands Islas de los Ladrones (Islands of the Thieves). "Those people are poor, but ingenious and very thievish, on account of which we called those three islands the islands of Ladrones." Pigafetta writes, And the captain-general wished to approach the largest of these three islands to replenish his provisions. But it was not possible, for the people of those islands entered the ships and robbed us so that we could not protect ourselves from them. And when we wished to strike and take in the sails so as to land, they stole very quickly the small boat called a skiff which was fastened to the poop of the captain's ship. At which he, being very angry, went ashore with forty armed men. And burning some forty or fifty houses with several boats and killing seven men of the said island, they recovered their skiff. Pigafetta also described the boats the inhabitants used, the sail shaped like a "lateen sail" (actually the crab claw sail), hence the name Islas de las Velas Latinas (Islands of the Lateen Sails), the name used first as Magellan claimed them for the Spanish crown. San Lazarus archipelago, Jardines ('gardens') and Prazeres are among the names applied to them by later navigators. In 1667, Spain formally claimed them, established a regular colony there and in 1668 gave the islands the official title of Las Marianas, in honor of Spanish Queen Mariana of Austria, widow of King Philip IV of Spain and Queen Regent of the Spanish Empire ruling during the minority of her son King Charles II. They then had a population of more than 50,000 inhabitants. With the arrival of passengers and settlers aboard the Manila Galleons from the Americas, new diseases were introduced in the islands, which caused many deaths in the native Chamorro population. The native population, who referred to themselves as Taotao Tano (people of the land) but were known to the early Spanish colonists as Chamurres or HachaMori, eventually died out as a distinct people, though their descendants intermarried. At the Spanish occupation in 1668, the Chamorros were estimated at 50,000, but a century later only 1,800