Over a hundred years later, missionaries had more success, setting up posts along the river. Spanish Franciscan missionaries gave the river its current name based on San Juan del Puerto (St. John of the Harbor), the mission established at the river 's mouth following the demise of the French fort. The name first appeared on a Spanish map created between 1680 and 1700.
who is the st johns river named after
San Juan del Puerto (St. John of the Harbor), the mission established at the river 's mouth following the demise of the French fort