Name three figures from the Renaissance.

One key figure from the Renaissance would be Johann Gutenberg. He invented movable type, which allowed books to be printed quickly and thus made them more affordable. Gutenberg's invention also allowed many languages, such as French and English, to be seen in print by the masses, thus making them the language of choice for legal documents. This led to the rise of nationalism in Europe during the Renaissance. Gutenberg's printing press made learning more available which was one of the key points of the period.
Another key figure would be Martin Luther, who in 1517 spoke out against the Catholic Church. Luther saw the Papacy as being corrupt and he wanted a return to the original church as was had by the earliest Christians. Thanks to Luther, Protestants splintered off into various religious sects as people had the courage to interpret the Bible differently.
Another key figure is Christopher Columbus. Columbus, a sailor from Genoa, postulated that it would be easier for Spain to reach the valuable spice trade by sailing west instead of sending trade caravans east. While Columbus did not meet his goal, he did discover the island of Hispaniola. From here, Spain developed a large New World empire. The riches of Spain would be squandered in European wars, but Spain's achievement would inspire other powers to get in on the New World colonial race.