Gu Yanwu (1613-1682), late Ming and early Qing Confucian philosopher, linguist and historian, played a founding role in phonology of early Chinese, author of Rizhilu or Record of daily study 日知錄|日知录
Examples (Wiktionary)
Mandarin
顾炎武
顧炎武
gù yán wǔ
Gu Yanwu (Chinese scholar-official during the latter part of the Ming dynasty into the early part of the Qing)