Zheng Zhilong (1604–1661), also known as Nicholas Iquan Gaspard, was a Chinese merchant, pirate and military leader in the late Ming dynasty who later defected to the Qing dynasty. He was from Nan'an, Fujian. He was the father of Zheng Chenggong (Koxinga), the founder of the pro-Ming Kingdom of Tungning in Taiwan. After his defection, he was enfeoffed as a Count of the Second Rank by the Qing government, but was eventually executed because of his son's continued resistance against the Qing regime.