Yin Zhu, courtesy name Shilu (师鲁), was a Northern Song scholar-official and a key figure in the early classical-prose revival movement (古文运动). He worked closely with Ouyang Xiu and Fan Zhongyan, advocating a return to the lean, direct style of Han and Tang prose. His best-known work is 《河南先生文集》.
usage
尹 is the surname (also a common Chinese surname today); 洙 is the given name, borrowed from the river 洙水 in Shandong, near Confucius's hometown, signaling scholarly aspirations.