Meng Xiaobo 孟孝伯 Zhongsun Jie 仲孫羯

Zhongsun Jie 仲孫羯 (died 524 BCE), posthumous title Meng Xiaobo 孟孝伯, was a member of the family Zhongsun 仲孫 (or Mengsun 孟孫), one of the Three Huan families 三桓 that dominated the state of Lu 魯 during the Spring and Autumn period 春秋 (770-5th cent. BCE).

He was the son of a concubine of Zhongsun Shu 仲孫速 (Meng Zhuangzi 孟莊子) and represented the family after the death of his father, who had inherited the title to his younger brother Zhongsun Jue 仲孫貜 (Meng Xizi 孟僖子). Zhongsun Jie had an older brother called Ruzi Yang 孺子秧 who left Lu and lived in the small state of Zhu 邾.

In 549 Zhongsun Jie commanded the army of Lu in a campaign against the state of Qi 齊. After his death, his uncle Zhongsun Jue became the head of the family.