Zheng Zhilong
Zheng Zhilong allegedly had an unknown daughter with another Japanese woman who was not Tagawa Matsu but this is only mentioned by one writer, Palafox who is very unreliable. This alleged daughter was supposedly among the Japanese who converted to Christianity. The alleged daughter was mentioned in "history of the Conquest of China" by Palafox while Japanese and Chinese accounts make zero mention of any daughter who could hardly have been ignored while reaching her teenager years. It is more likely that the Capitan Cina's daughter Elizabeth could be this alleged daughter of Zheng Zhilong by the mystery Japanese woman, if she was even a real person in the first place.