[3] The Soushenji "reported that in the southwest of Shu there were monkey-like animals whose names were jiaguo (猳國), mahua (馬化), or jueyuan (玃猿).

"[4] Direct descendants of Huang Di of Hua Xia include descendants of Yellow Emperor and Chiyou during the Xia dynasty, also many sons and grandsons of Yu the Great, have taken Yang as surname, some of its sub-domains are the prominent Yang Jian of Zhou which take role as a Heavenly Marshal take his colony to seek peace after the Zhou dynasty win and erected his colony peacefully.

[2] During the Warring States period (403–221 BC) his descendants fled to escape destruction by the conquering the Qin, and simplified their surname to Yang.

The "Hall of Four Wisdoms (四知堂)" refers to a story concerning Yang Zhen (楊震), an official of the Eastern Han dynasty (206 BC - 220 AD), and known for his erudition as well as moral character.

Descendants of Yang Zhen adopted the "four wisdoms", or "Si Zhi (四知)" as the title of their clan hall.

[11] This is current asserted prevalent lineage for the Yang surname prior to Boqiao: Huangdi (黃帝) -> Shaohao (少昊) -> Emperor Ku (帝喾) -> Hou Ji (后稷) -> Gugong Danfu (古公亶父) -> King Wen of Zhou (周文王) -> King Wu of Zhou (周武王) -> Shu Yu of Tang (唐叔虞) -> Marquis Mu of Jin (晉穆侯) -> Zhuang Bo of Quwo (曲沃莊伯) -> Duke Wu of Jin (晉武公) -> Boqiao (伯僑 [zh]) -> Yang Shíwo (杨食我 [zh])[12][13][2]