Wei Collection, Middle Volume. Radical: Sheep (yáng). Character: you. Kangxi stroke count: 9. Page 951, Number 12.
Guangyun (Guangyun), Jiyun (Jiyun), and Yunhui (Yunhui) state the pronunciation is formed by the initial yu or yi and the final jiu, sounding like you.
Shuowen Jiezi (Shuowen Jiezi) defines it as to advance goodness.
Yupian (Yupian) defines it as to lead or guide. It is currently written as you. It is also written in a variant form pronounced you.
Book of Documents (Shangshu), Announcement of King Kang: Only Wen and Wu of Zhou greatly received the favor of heaven and followed it.
The Commentary (Zhuan) says: This means Wen and Wu greatly received the Way of Heaven and followed it.
The Sub-commentary (Shu) states: The sound of the character you is close to you, meaning a plan or the Way. Therefore, it is glossed as the Way. Wang Su says: This character means the Way.
Also, Shuowen Jiezi states: King Wen was imprisoned in Youli, which is in Tangyin.
Records of the Grand Historian (Shiji), Basic Annals of Zhou: Emperor Zhou then imprisoned the Earl of the West at Youli.
The Note states: There is a Youli City in Tangyin of the Henei region, the place where the Earl of the West was detained.
Also: During his imprisonment at Youli, he presumably expanded the eight trigrams of the Book of Changes (Yijing) into sixty-four hexagrams.
Also, Guangyun states: It is also a surname.
Verification: Yupian states it means to lead. It is currently written as you. It is also written in a variant form pronounced you. This has been corrected according to the original text.