Gu Yanwu, Chinese philologist and geographer (d. 1682)
Gu Yanwu (Chinese: 顧炎武) (July 15, 1613 – February 15, 1682), also known as Gu Tinglin (Chinese: 顧亭林), was a Chinese philologist, geographer, and famous scholar-official in Qing dynasty. He spent his youth during the Manchu conquest of China in anti-Manchu activities after the Ming dynasty had been overthrown. He never served the Qing dynasty. Instead, he traveled throughout the country and devoted himself to studies.