Amerigo Vespucci explorered the New World on several different voyages. On his first, he was sponsored by Spain. He sailed southeast to present day Brazil in South America. After returning home, Portugal the. Sent him back to the same area. At this time, he claimed the area of Brazil for Portugal, which gave them power to control more land. Upon returning from this exploration, he gave this information to mapmaker, who would name this continent South America, after Amerigo Vespucci.