During Rajah Humabon's reign, the region had since become an important trading center where agricultural products were bartered. From Japan, perfume and glass utensils were usually traded for native goods. Ivory products, leather, precious and semi-precious stones and ''śarkarā''(Sarkarai in Tamil) (sugar) mostly came from India traders and Burmese people traders.   The harbors of Sugbu and the capital Singhapala became known colloquially as ''sinibuayng hingpit'' ("the place for trading"), shortened to ''sibu'' or ''sibo'' ("to trade"), from which the modern Castilian name "Cebú" originates. It was also during Humabon's reign that Lapu-Lapu arrived from Borneo, and was granted by Humabon the region of Mandawili (now Mandaue), including the island known as Opong or Opon (later known as Mactan). First contact with the Spanish also occurred during Humabon's reign, resulting in the death of Ferdinand Magellan.