The four crossword solutions for the term 'First Name in Exploration' are Marco (5 letters), AMERIGO (7 letters), Leif (4 letters), and Eric (4 letters). Marco Polo was a Venetian merchant and explorer who traveled to China in the 13th century. AMERIGO Vespucci was an Italian explorer who explored the east coast of South America in the 15th century. Leif Erikson was a Norse explorer who is credited with being the first European to land in North America in the 11th century. Eric the Red was a Norse explorer who founded the first Norse settlement in Greenland in the 10th century.