Vasco Núñez de Balboa
Vasco Núñez de Balboa (; c. 1475around January 12–21, 1519) was a Spanish explorer, governor, and conquistador. He is best known for having crossed the Isthmus of Panama to the Pacific Ocean in 1513, becoming the first European to lead an expedition to have seen or reached the Pacific from the New World.
South Seas
The Spanish conquistador Vasco Núñez de Balboa coined the term "South Sea" when he traveled through the isthmus of Panama and named the ocean lying ahead (Pacific) "Mar del sur" („South Ocean“).