(died 1732) Jesuit scholar and missionary; born Le Mans, France; died Peking. Arriving in China, 1688, he was appointed mathematician to Emperor Khang-hi, and from 1708-1715 made a survey of the empire, and prepared maps of the provinces. He shared all the labors of his fellow missionaries, who were aided by his influence with, the emperor, and compiled a Tatar treatise on mathematics and a Chinese dictionary.