Cornelis Matelief de Jonge was a Dutch admiral who was active in establishing Dutch power in Southeast Asia during the beginning of the 17th century. His fleet was officially on a trading mission, but its true intent was to destroy Portuguese power in the area. The fleet had 1400 men on board, including 600 soldiers. Matelieff did not succeed in this. The Dutch would ultimately gain control of Malacca more than thirty years later, again joining forces with the Sultanate of Johor, and a new ally Aceh, in 1641. He was born and died in Rotterdam.