In 1664 the Dutch lost New Netherlands when the British took control of the land and added it to their colonies. They divided the land in half and gave control to two proprietors: Sir George Carteret (who was in charge of the east side) and Lord John Berkley (who was in charge of the west side). The land was officially named New Jersey after the Isle of Jersey in the English Channel. Carteret had been governor of the Isle of Jersey.