Francisco Serrão was a Portuguese explorer and a possible cousin of Ferdinand Magellan. His 1512 voyage was the first known European sailing east past Malacca through modern Indonesia and the East Indies. He became a confidant of Sultan Bayan Sirrullah, the ruler of Ternate, becoming his personal advisor. He remained in Ternate where he died around the same time Magellan died.

Ferdinand Magellan was a Portuguese explorer best known for having planned and led the 1519 Spanish expedition to the East Indies across the Pacific Ocean to open a maritime trade route, during which he discovered the interoceanic passage thereafter bearing his name and achieved the first European navigation to Asia via the Pacific. After his death, this expedition was the first to circumnavigate the globe in 1519–22 in the service of Spain.