Guo Xiang
However, Sima Qian's biography of Zhuangzi pre-dates Guo Xiang (Kuo Hsiang) by centuries. Furthermore, the "Han Shu" "Yiwenzhi" (Monograph on literature) lists a text "Zhuangzi", showing that a text with this title existed no later than the early 1st century AD, again pre-dating Guo Xiang by centuries.