He was one of the early explorers of the Mexican coastline, and was killed by natives in Honduras on 21 January 1527.
After rounding the Guaniguanico in Cuba, Grijalva sailed along the Mexican coast, discovered Cozumel on 3 May 1518, and arrived on 8 June 1518 at the Tabasco region in southern Mexico.
One of the natives joined them, being baptized as Francisco, and became a Nahuatl interpreter on Cortes' expedition.
Bernal Díaz del Castillo wrote about the travels of Juan de Grijalva in his book Historia de las Indias..[1]: 27–43, 82 According to W H Prescott's "Conquest of Mexico," Grijalva was the first Spaniard to bring back word of the plentiful gold hoard of the Aztecs, inflaming passions for conquest.
In 1518 Hernán Cortés stayed at Juan's home in Trinidad, Cuba, at the start of his Mexican expedition.