Cornelis Jacobsen Mey, often spelled Cornelius Jacobsz May, among other spellings in Dutch, was a 17th-century Dutch explorer, captain, and fur trader. Mey was the first director of New Netherland and was stationed at Fort Amsterdam. Mey was the captain of the ship Nieu Nederlandt, which delivered the first boatload of colonists to New Netherland in north-east America.