Was Vasco Nunez de Balboa was executed in 1519?

No, Vasco Núñez de Balboa was not executed in 1519. He was actually arrested and later executed in January 1519, primarily due to political rivalries and accusations of treason against the governor of the region, Pedro Arias Dávila. Balboa is best known for his exploration of the Pacific Ocean, which he was one of the first Europeans to see from the Americas.